Agency overview | |
---|---|
Formed | 1939 |
Preceding agencies |
|
Dissolved | 1985 (39 years ago) |
Superseding agencies | |
Jurisdiction | U.S. federal government |
Headquarters | Washington, D.C. |
Parent agency | Federal government of the United States |
The Civil Aeronautics Board (CAB) was an agency of the federal government of the United States, formed in 1940 from a split of the Civil Aeronautics Authority [1] and abolished in 1985, that regulated aviation services (including scheduled passenger airline service [2] ) and, until the establishment of the National Transportation Safety Board in 1967, conducted air accident investigations. The agency was headquartered in Washington, D.C.
The authority of the Civil Aeronautics Board to regulate airlines was established by the Civil Aeronautics Act of 1938. The 1938 Act was amended by the Federal Aviation Act of 1958, but the main effect of that was to establish the Federal Aviation Agency (FAA), which among other things regulated (as it still does) airline operations and safety. The 1966 Department of Transportation Act, which established the US Department of Transportation (DOT), had a bigger impact on the CAB. The 1966 Act established the National Transportation Safety Board (NTSB) as part of DOT, which absorbed the CAB safety function, which was to investigate most airline accidents. Unlike the FAA, which (renamed as the Federal Aviation Administration) became part of DOT in the 1966 Act, the CAB remained an independent government agency. [3]
While CAB regulation suppressed free competition, it provided security for the existing airlines, avoided gluts and shortages of passengers on certain routes, and (partly by allowing airlines to carry air mail) secured airline service for communities that would have otherwise been served less, or not have been served at all (due to low passenger traffic or other reasons). [2] [4]
CAB authority included: [5] [2] [4]
Airlines had no ability to make competitive decisions, absent CAB approval, on choice of route or fare charged on any particular route. [17]
The Act also prevented the CAB from regulating certain things: frequency, equipment, accommodations and facilities. It was up to the carrier to determine what aircraft it flew and how often and what airport or ticket facilities it built/rented, and so forth. However, the CAB did generally require a minimum adequate service, e.g. often two flights/day, in a market. [18]
The Civil Aeronautics Authority Act of 1938 superseded the Watres Act, which had regulated commercial aviation since the mid-1920s, and created a new agency, the Civil Aeronautics Authority. [19] [20] The agency was renamed in 1940, [21] due to a merger with the Air Safety Board. [22] It became an independent agency under Reorganization Plans Nos. III and IV of 1940, effective on June 30, 1940. [23] The Air Safety Board had formed in 1938.
Other predecessor agencies included the Aeronautics Branch (1926–1934), the Bureau of Air Commerce (1934–1938), and the Bureau of Air Mail, Interstate Commerce Commission (1934–38). [24]
The first air accident investigation led by the CAB was the 1940 Lovettsville air disaster.[ citation needed ]
Some duties were transferred to the Federal Aviation Agency in 1958. [21]
The National Transportation Safety Board (NTSB) was established in 1967, taking over air accident investigation duties. [21]
In 1975, Senator Ted Kennedy, in his capacity as Chair of the Subcommittee on Administrative Practice and Procedure of the U.S. Senate Committee on the Judiciary, assisted by Stephen Breyer, then a counsel to the judiciary committee (and later a Supreme Court Justice), held widely-reported hearings on the CAB. [25] These hearings were later seen as the beginning of the process which ended in airline deregulation by the end of 1978. [26] These publicized, among much else, the success that carriers like Southwest Airlines and Pacific Southwest Airlines had as intrastate airlines in Texas and California, despite the much lower fares they charged, [27] and the degree to which the CAB acted primarily in the interests of the airlines, rather than consumers [28] (the CAB chair until 1974, Robert D. Timm, prioritized ensuring scheduled airlines made a 12% return on investment [29] and was caught accepting a Bermuda golf vacation from those airlines [30] —Kennedy's subcommittee referred Timm to the Justice Department for possible prosecution.) [31] Links to the transcripts of those hearings, the associated evidence and exhibits, and the report that Kennedy and Breyer wrote, are in External links below.
Also in 1975, President Ford appointed John E. Robson as CAB Chair. Under the chairmanship of John Robson, the Civil Aeronautics Board "in April 1976 did the unthinkable, becoming the first regulatory body to support deregulation," which President Gerald Ford first spurred in February 1975 with a proposal to abolish the CAB altogether. [32] Robson was followed as CAB Chair by Cornell University professor Alfred E. Kahn, appointed by President Jimmy Carter. Kahn was a well-known specialist in regulatory economics, having written one of the standard texts [33] and had previously been chairman of the New York Public Service Commission, the body regulating utilities in New York State. The CAB continued to be a focus of the early deregulation movement, and its dissolution was one of the most conspicuous pioneering event of that movement. [34] [4] [35] The Airline Deregulation Act of 1978 specified that the CAB would eventually be disestablished — the first federal regulatory regime, since the 1930s, to be totally dismantled [35] [34] — and this happened on January 1, 1985. [36] The remaining tasks were transferred to the Secretary of Transportation except for a few going to the U.S. Postal Service. [21]
The CAB regulated almost all commercial air transportation in the US, but there were some exceptions.
The CAB chose not to regulate airlines flying "small aircraft". This was formalized in Part 298 of the Board's economic regulations, which in 1952 gave a blanket authorization for any airline operating an aircraft with a maximum gross takeoff weight of 12,500 lbs or less. Such airlines were originally known as "air taxis", later as commuter airlines or Part 298 carriers. Confusingly, "air taxi" was also the term by which the CAB referred to Aspen Airways and Wright Air Lines (after they became certificated carriers) within the CAB's taxonomy of certificated scheduled airlines (see "Airline categories" below). However, in 1972 the CAB expanded this category to include aircraft of 30 passengers or fewer, with a payload of less than 7,500 lbs. [37] Such carriers did have to obtain Federal Aviation Administration operational/safety certification but were otherwise able to fly wherever they pleased.
The CAB would, on occasion, also exempt air-taxi or commuter operators to operate aircraft larger than the limits. For instance, in 1971, it exempted Executive Airlines and Air New England (at that time a commuter carrier) to fly propeller aircraft up to 44 seats to expand service in New England. [38]
On five occasions, the CAB certificated former air taxi/commuter airlines to fly larger aircraft. These airlines were then regulated by the CAB like any other CAB carrier:
An airline that restricted flying to within one state and took other steps to minimize participation in interstate commerce could avoid CAB regulation and fly as an intrastate airline. In the case of air taxis, the CAB chose not to regulate. In the case of intrastate airlines, it was legally unable to. Restriction of flying to a single state was not sufficient to avoid CAB regulation; the additional measures to avoid interstate commerce were critical. Furthermore, flying within a single state was generally interpreted strictly. An aircraft flying outside the boundaries of that one state could trigger CAB authority, including, in the case of Hawaii, flying overwater between the islands, which was upheld in court as being intrinsically interstate commerce because the Federal government had domain over the seas.
Note that the Federal government, while not providing economic regulation over intrastate carriers, did regulate them from an operational/safety standpoint. For those purposes intrastate airlines were regulated by the Federal Aviation Administration just like any other carrier.
Uncertificated carriers, known by a variety of names over time, such as contract carriers or Part 45 carriers, were airlines which escaped CAB regulation by not being common carriers - in other words, they did not hold themselves out to the public as a carrier. Zantop Air Transport was an example of such a company, flying aircraft on behalf of the US automakers on a private basis (before it acquired a supplemental certificate in 1962). "Part 45" was a reference to the then Civil Aviation Regulations under which the then Federal Aviation Agency regulated the operations/safety of such non-common carrier operators. [44]
Over time, the Civil Aviation Regulations (subsequently the Federal Aviation Regulations) changed. Instead of Part 45, such uncertificated carriers were moved to being regulated under Part 42. They then became known as Part 42 carriers. [45] Finally, the regulations were completely revamped, with most commercial operations moved to Part 121. Such operators were then known as Part 121 commercial operators or simply just commercial operators. A prominent example of such a carrier was Zantop International Airlines (ZIA), which started in 1972 as a Part 121 commercial operator, uncertificated by the CAB. [46]
The CAB regularly enforced its powers against uncertificated carriers engaged in activities the CAB saw as making them common carriers. For instance, in February 1961, the issued a cease-and-desist order to, among others, Trans Global Airlines, Inc. aka Golden State Airlines, a Part 45 carrier, for carrying passengers to the Dunes Hotel in Las Vegas for "free". The fact that transportation was provided as part of the cost of accommodation did not make the airline any less a common carrier, and therefore guilty of providing interstate air transportation without a CAB certificate. [47] The results of such investigations were not necessarily a foregone conclusion. In 1976, the CAB ended a long investigation by deciding ZIA was, in fact, not a common carrier (and thus did not require certification), going against the decision of its own administrative law judge. [48] Ironically, this happened only a year before ZIA separately applied for and received certification as a supplemental air carrier. [46]
Air travel clubs were membership organizations, nominally private, that had their own aircraft and ran trips for members. In 1968, the FAA instituted Part 123 of the Federal Aviation Regulations under which air travel clubs had their own operational requirements. [50] Starting in the early 1970s, the CAB went after some of the largest air travel clubs for being de-facto common carriers. In 1973, it shut down Voyager 1000, a large Indiana-based air travel club. [51] Voyager, which had a fleet comprising a Boeing 720, two Lockheed Electras and some piston aircraft and its own terminal at Indianapolis Airport, unsuccessfully appealed to the federal courts. [52] The chief pilot of Voyager was George Mikelsons, who left to found what later became ATA Airlines. The CAB went on to shut two other large clubs in 1974 [53] and 1975. [54] Notwithstanding these enforcement actions, in November 1979 (within the first year of deregulation) there were still 11 air travel clubs operationally regulated under Part 123, though by May 1980 it had dropped to seven. [55]
The CAB divided the airlines it regulated into categories according to the roles they were meant to play. The following draws from the CAB's FY 1977 Report to Congress dated May 1978, [56] and so reflects the state of CAB airline certification just prior to deregulation.
The first split was between scheduled and non-scheduled (charter carriers). The CAB referred to non-scheduled carriers, in 1978, as supplemental air carriers . Prior to 1955, the CAB called them irregular air carriers. [57] Scheduled carriers were also free to offer charters. Throughout the history of the CAB, the supplementals constantly attempted to become scheduled carriers and the CAB constantly rejected them. There were also tight restrictions on supplementals, designed to protect the scheduled carriers.
Airline [58] | Op revenue (USD mm) [59] | Fleet (bold indicates jet type) |
---|---|---|
Capitol International Airways | 87.0 | 12 DC-8 [60] |
Evergreen International Airlines | 40.9 | 6 DC-8, 3 DC-9 , 4 Lockheed Electra, 7 CV-580 [61] |
McCulloch International Airlines | 1.2 | (1) [62] |
Modern Air Transport | (2) | |
Overseas National Airways | 28.3 | (1) [63] |
Rich International Airlines (3) | 2.9 | 2 DC-6, 3 C-46 [64] |
Southern Air Transport | N/A | 2 Lockheed L-100-20, 1 Lockheed L-100-30 [65] |
Trans International Airlines | 231.2 | 3 DC-10, 14 DC-8, 11 Lockheed L-100-30, 9 Lockheed Electra [66] |
World Airways | 126.6 | 3 DC-10, 5 DC-8 [67] |
Zantop International Airlines | 10.3 | 5 DC-8, 16 Lockheed Electra, 11 DC-6, 14 CV-640 [68] |
Scheduled carriers were split between domestic and international. Two carriers were exclusively international: Air Micronesia (a subsidiary of Continental Airlines) and cargo carrier Seaboard. One carrier was almost exclusively international: Pan Am and, until deregulation, was not permitted to sell tickets for transport within the continental US. While it could fly aircraft from, say, New York to Los Angeles, it could not sell tickets between New York and Los Angeles despite having significant international operations in both cities. All other international carriers were also domestic carriers. There was a split within international between passenger airlines (which were always free to carry cargo and sometimes flew pure cargo aircraft) and cargo airlines.
Domestic had many subcategories. The original CAB scheduled carriers were known as trunkline carriers, trunklines, trunk airlines or simply just trunks, with most (but not all) such carriers having certificates dating back to 1938, the date of the Civil Aeronautics Authority Act that created the CAB. These were carriers such as United Air Lines, American, TWA, etc, all with origins going back to the 1920s and 1930s. For a summary, see the table below.
After World War II, the CAB certificated a second set of scheduled carriers, the local service carriers. In theory, local service airlines served smaller routes than the trunklines, though most trunklines tended to have some legacy points on their networks that were quite small. Over time, the CAB allowed local service carriers to compete on some routes with trunklines and some local service carriers became sizeable airlines. However, as shown in the table below, in 1978, just prior to deregulation, the largest local service carrier Allegheny (soon to rename itself USAir) was still smaller in revenue terms than the smallest trunk, National, and basic operating statistics show the local service carriers as flying distinctly less capacity, smaller aircraft and shorter routes than the trunks.
Local service carriers were also the biggest recipients of CAB subsidies, as shown below. In 1978, the CAB paid a total of $66.3 million in subsidies to airlines [69] (over $275 million in 2024 dollars) of which $58.5 million was paid to local service carriers, equivalent to over 40% of local service carrier operating profits that year. [70]
Other CAB domestic categories included intra-Alaskan, Hawaiian, helicopter, regional, air taxi, and cargo. Historically there was a territorial category, superseded by Hawaiian and Intra-Alaskan after Hawaii and Alaska became states. Some carriers had more than one domestic status. For instance, Alaska Airlines was listed as both an Alaska carrier and a trunk, however, for the purposes of 1978 CAB statistics it was counted as an Alaska carrier.
The wide variety of carriers in the table below hints at problems with just one facet of CAB regulation. Tiny Alaskan back-country carriers like Munz Northern and Kodiak-Western were subject to the same kind of proceedings as huge airlines like United and American. 1975 certification proceedings for Munz Northern were memorialized in 32 pages of CAB reports, encompassing the deliberations of the (usually five but in this case four) member CAB board itself, plus the earlier deliberations of an administrative law judge in front of whom six people appeared, representing Munz and two other interested parties. At the time, Munz had six aircraft, each carrying 10 people or fewer. [71] Further, Munz then had the same reporting requirement as carriers like United, all the usual reams of data that had to be sent to the CAB, for a carrier a tiny fraction of the size.
Airline(1) [72] | Certificate type [72] | Certificate year(2) [72] | Op rev(3) [73] [74] | Subsidy(4) [73] | Sched ASMs (bn)(5) [75] | Avg Seats/ Mile(6) [75] | Stage length (mi)(7) [75] | Fleet (bold text indicates jet) |
---|---|---|---|---|---|---|---|---|
American Airlines | trunk/intl | 1938 | 2,736.4 | 45.49 | 154.2 | 799.8 | 8 B747, 31 DC-10, 67 B707, 145 727 ; freighters 3 B747, 8 B707 [76] | |
Braniff Airways | trunk/intl | 1938 | 966.5 | 17.84 | 138.5 | 583.1 | 3 B747, 14 DC-8, 93 B727 [77] | |
Continental Air Lines | trunk/intl | 1938 | 772.0 | 14.53 | 155.2 | 618.5 | 15 DC-10, 51 B727 [78] | |
Delta Air Lines | trunk/intl | 1938 | 2,241.6 | 37.55 | 151.5 | 457.9 | 22 L-1011, 23 DC-8, 110 B727, 52 DC-9 [79] | |
Eastern Air Lines | trunk/intl | 1938 | 2,379.6 | 39.06 | 135.5 | 509.1 | 34 L-1011, 5 A300, 127 B727, 75 DC-9 [80] | |
National Airlines | trunk/intl | 1938 | 636.4 | 13.83 | 174.1 | 694.5 | 15 DC-10, 38 B727 [81] | |
Northwest Airlines | trunk/intl | 1938 | 794.4 | 14.30 | 226.2 | 667.2 | 15 B747, 22 DC-10, 62 B727; freighters 4 B747 [82] | |
Pan American World Airways | intl/trunk/AK/HI | 1938 | 2,281.8 | 34.42 | 299.0 | 1,509.2 | 38 B747, 38 B707, 15 B727; freighters 5 B747 [83] | |
Trans World Airlines | trunk/intl | 1938 | 2,474.7 | 42.65 | 165.0 | 897.1 | 11 B747, 28 L-1011, 94 B707, 80 B727, 14 DC-9 [84] | |
United Air Lines | trunk/intl | 1938 | 3,523.4 | 61.94 | 161.2 | 694.8 | 18 B747, 42 DC-10, 56 DC-8, 125 B727, 59 B737 ; freighters 14 DC-8 [85] | |
Western Air Lines | trunk/intl | 1938 | 834.5 | 15.76 | 147.9 | 645.6 | 9 DC-10, 12 B707, 62 B727 [86] | |
Air Micronesia | intl | 1971 | (8) | |||||
Allegheny Airlines | local svc/intl | 1949 | 566.8 | 6.72 | 90.4 | 242.5 | 10 B727, 45 DC-9, 30 BAC 1-11 [87] | |
Frontier Airlines | local svc/intl | 1946 | 287.2 | 12.2 | 3.77 | 81.6 | 230.2 | 2 B727, 35 B737, 27 CV-580 [88] |
Hughes Air Corp dba Hughes Airwest | local svc/intl | 1968 | 313.2 | 7.6 | 4.18 | 94.6 | 282.0 | 9 B727, 40 DC-9, 6 F-27 [89] |
North Central Airlines | local svc/intl | 1947 | 298.5 | 12.0 | 3.09 | 90.0 | 147.6 | 34 DC-9, 24 CV-580 [90] |
Ozark Air Lines | local svc | 1950 | 229.7 | 10.0 | 2.70 | 87.3 | 195.9 | 32 DC-9, 13 FH-227 [91] |
Piedmont Airlines | local svc | 1947 | 205.6 | 9.3 | 2.62 | 85.7 | 180.7 | 6 B727, 27 B737, 19 NAMC YS-11 [92] |
Southern Airways | local svc/intl | 1948 | 188.5 | 4.3 | 2.45 | 76.0 | 206.5 | 30 DC-9, 8 Swearingen Metro [93] |
Texas International Airlines | local svc/intl | 1946 | 181.7 | 3.1 | 2.60 | 90.8 | 304.5 | 26 DC-9, 3 CV-600 [94] |
Alaska Airlines | Alaska/trunk | 1942 | 83.5 | 0.3 | 1.19 | 105.9 | 566.5 | 11 B727 [95] |
Kodiak-Western Alaska Airlines | Alaska | 1960 | 1.7 | 0.4 | (9) | 3.0 | 38.3 | 12 assorted piston-powered aircraft [96] |
Munz Northern Airlines | Alaska | 1976 | 2.9 | (9) | 9.0 | 76.8 | 17 small piston-powered aircraft [97] | |
Reeve Aleutian Airways | Alaska | 1948 | 13.2 | 0.08 | 49.1 | 420.0 | 3 Lockheed Electra, 2 NAMC YS-11, 2 C-46 [64] | |
Wien Air Alaska | Alaska | 1942 | 63.7 | 1.8 | 0.43 | 51.8 | 151.5 | 7 B737, 2 FH-227, 1 F-27, 1 Grumman Mallard [98] |
Aloha Airlines | Hawaiian | 1949 | 60.7 | 0.56 | 119.5 | 119.2 | 10 B737 [99] | |
Hawaiian Airlines | Hawaiian | 1938 | 89.9 | 0.72 | 136.6 | 119.8 | 12 DC-9, 5 Lockheed Electra; 1 Shorts 330 [100] | |
Air Midwest | regional | 1976 | 5.3 | 1.5 | 0.04 | 16.9 | 115.8 | 5 Swearingen Metro, 1 Cessna 206 [101] |
Air New England | regional | 1975 | 20.8 | 3.8 | 0.13 | 29.9 | 82.3 | 8 FH-227, 10 DHC-6 Twin Otter [102] |
Aspen | air taxi | 1967 | 7.8 | 0.05 | 46.7 | 116.8 | 10 CV-580 [103] | |
Wright | air taxi | 1972 | 4.9 | (9) | 40.5 | 100.3 | 6 CV-600 [104] | |
New York Airways | helicopter | 1952 | 8.2 | 0.01 | 25.0 | 12.6 | 3 Sikorsky S-61L [105] | |
Airlift International (10) | domestic cargo | 1956 | 84.3 | 924.0 | 8 DC-8, 1 B727 [106] | |||
Flying Tiger | domestic/intl cargo | 1949 | 404.2 | 1,377.0 | 6 B747, 19 DC-8 [107] | |||
Seaboard | intl cargo | 1955 | 118.6 | 2,658.9 | 3 B747, 2 DC-10, 5 DC-8 [108] |
The agency had its headquarters in the Universal Building in Dupont Circle, Washington, D.C. [109] [110] The agency had moved there by May 1959. [111] Previously it had been headquartered in the Commerce Building (a.k.a. the Herbert C. Hoover Building), [112] and its offices were in several buildings. [111] After moving into the Universal Building, CAB leased space there. By 1968 the agency had acquired an additional approximately 2,000 square feet (190 m2) of space in the same building, resulting in additional rent expenses. [113]
Saturn Airways was a US supplemental air carrier, certificated as such by the Civil Aeronautics Board (CAB), the now-defunct Federal agency that, at the time, tightly regulated almost all US air transport. Saturn operated from 1948 until 1976. Originally a Florida company, Saturn moved to Oakland, California in 1967 where its headquarters were located on the grounds of Oakland International Airport.
Overseas National Airways (ONA) was a supplemental air carrier during the period in which the Civil Aeronautics Board (CAB), a now defunct United States Federal agency, tightly regulated almost all US commercial air transport. From 1964 onward, supplemental carriers were charter carriers, but until 1964 they were charter-scheduled hybrids. Until 1950, ONA was known as Calasia Air Transport, and until 1947, Air Travel.
Rich International Airways was primarily a United States charter and cargo airline founded by aviation pioneer Jean Rich, one of the few women in the U.S. to own and operate an airline. The air carrier was based in Miami, Florida. The airline ceased operations in 1996 and filed for bankruptcy in 1997.
Southern Air Transport (SAT), based in Miami, Florida, was, in its final incarnation, a cargo airline. However, it started life as an irregular air carrier, a type of carrier defined and tightly controlled until 1978 by the Civil Aeronautics Board (CAB), a now defunct Federal agency that, at the time, closely regulated almost all US commercial air transportation. From 1965 onward, such airlines were charter carriers. Up until 1965, they were charter/scheduled hybrids. For much of that time the carrier was owned by the Central Intelligence Agency (CIA) (1960–1973).
Air New England (ANE) was a US regional airline in New England during the 1970s and early 1980s. It was headquartered at Logan International Airport in the East Boston area of Boston, Massachusetts. ANE was noneconomic for most of its existence. From 1975 through its last year, 1981, ANE depended heavily on government subsidies. Depending on the year, these accounted for 17 to 25% of operating revenues, despite which the airline was generally unprofitable. ANE collapsed in the early years of US airline deregulation.
Trans Caribbean Airways (TCA) was an irregular air carrier until 1957, when it was certificated by the Civil Aeronautics Board (CAB) as an international air carrier to fly from New York City to San Juan, Puerto Rico. TCA thereafter operated as a small scheduled airline specializing in flying from New York to the Caribbean, adding a small number of additional routes over time until it was purchased by American Airlines in 1971.
AAXICO Airlines was an airline based in the United States. AAXICO is an acronym for American Air Export and Import Company. Initially founded as a non-scheduled airline or irregular air carrier, AAXICO was awarded certification as a scheduled air cargo airline in 1955 by the Civil Aeronautics Board (CAB), the now-defunct Federal agency that, at the time, tightly regulated almost all US commercial air transportion. However, in 1962 AAXICO reverted to a supplemental air carrier. In 1965, it was nominally bought by Saturn Airways, another supplemental airline, but AAXICO was the surviving management and ownership. In its later years, AAXICO was noted for its consistent profitability, financial strength and its near total focus on flying for the military.
Airlift International was an American cargo airline that operated from 1945 to 1991, initially under the name Riddle Airlines. It was certificated as a scheduled freight airline in 1951 by the Civil Aeronautics Board (CAB), the now-defunct federal agency that, at the time, tightly regulated almost all US commercial air transport. Airlift's headquarters were at Miami International Airport, Florida.
Vance International Airlines (VIA) was a small US air taxi and supplemental air carrier, a type of airline defined and regulated by the Civil Aeronautics Board (CAB), a now defunct Federal agency that from 1938 to 1978, tightly regulated almost all commercial air transportation in the United States. VIA was named after Vance B. Roberts, an example of a company named for the first name rather than last name of its founder.
Local service carriers, or local service airlines, originally known as feeder carriers or feeder airlines, were a category of US domestic airline created/regulated by the Civil Aeronautics Board (CAB), the now-defunct federal agency that tightly regulated the US airline industry 1938–1978. Initially 23 such airlines were certificated from 1943 to 1949 to serve smaller US domestic markets unserved/poorly served by existing domestic carriers, the trunk carriers, which flew the main, or trunk, routes. However, not all of these started operation and some that did later had their certificates withdrawn. One other carrier was certificated in 1950 as a replacement. "Feeder airline" alludes to another purpose, that such airlines would feed passengers to trunk carriers. It was expected that a significant number of passenger itineraries would involve a connection between a local service carrier and a trunk carrier.
California Central Airlines (CCA) was a post-war American scheduled price-focused intrastate airline based at Burbank, California, the most prominent airline associated with Charles C. Sherman. CCA slightly preceded, and during its existence was bigger than, its contemporary and competitor, Pacific Southwest Airlines (PSA). The core route of both airlines was from Los Angeles to the San Francisco Bay Area.
Intrastate airlines in the United States were air carriers operating solely within a single US state and taking other steps to minimize participation in interstate commerce, thus enabling them to escape tight federal economic airline regulation prior to US airline deregulation in 1979. These intrastate carriers therefore amounted to a small unregulated, or less regulated, sector within what was otherwise then a tightly regulated industry. As detailed below, flying within the geographic boundaries of a single state was a necessary but not sufficient condition to qualify as an intrastate carrier.
Trunk carriers or trunk airlines or trunklines or trunks, were the US scheduled airlines certificated in the period 1939–1941 by the Civil Aeronautics Authority (CAA) or its immediate successor, the Civil Aeronautics Board (CAB) after the passage of the 1938 Civil Aeronautics Act on the basis of grandfathering: those carriers that were able to show they performed scheduled service prior to the passage of the Act. During the regulated period (1938–1978) these carriers were an especially protected class, with the CAB regulating the industry in many respects in the interests of these companies, a form of regulatory capture. The importance of these carriers is reflected is shown that in 2024, the three largest airlines in the United States, American Airlines, Delta Air Lines and United Airlines were among the carriers certificated through this grandfathering in 1939.
United States Overseas Airlines (USOA) was a supplemental air carrier founded and controlled by Dr. Ralph Cox Jr, a dentist turned aviator, based at Cape May County Airport in Wildwood, New Jersey, where it had a substantial operation. It was one of the larger and more capable of the supplemental airlines, also known as irregular air carriers, during a period where such airlines were not simply charter carriers but could also provide a limited amount of scheduled service. USOA's operations included scheduled flights that spanned the Pacific. However, in the early 1960s USOA fell into significant financial distress leading to its 1964 shuttering by the Civil Aeronautics Board (CAB), the defunct federal agency that, at the time, controlled almost all commercial air transportation in the United States.
Johnson Flying Service (JFS) was an American certificated supplemental air carrier, a type of airline defined and regulated after World War II by the Civil Aeronautics Board (CAB), a now defunct federal agency which tightly regulated almost all commercial air transportation in the United States during the period 1938–1978. From 1964, supplemental air carriers were charter airlines; until 1964, they were scheduled/charter hybrids.
Standard Airways operated intermittently from 1946 through 1969 as a small supplemental air carrier a type of US airline regulated by the Civil Aeronautics Board (CAB), the now-defunct US federal agency that tightly regulated airlines from 1938 to 1978. From 1964 onward, a supplemental air carrier was a charter airline. Until 1964, such airlines were charter/scheduled hybrids and Standard Airways did operate some scheduled services. The airline went bankrupt in 1964 and did not operate again until 1966 with new investors. It converted to jets but then ceased flying again on August 1, 1969. Many attempts were made to restart the airline until the CAB finally revoked its certificate in 1975.
Resort Airlines was an unusual United States scheduled international airline certificated in 1949 by the Civil Aeronautics Board (CAB), the now-defunct Federal agency that, at the time, tightly regulated almost all commercial air transport in the United States. Resort's scheduled authority was restricted to offering all-expenses paid escorted tours to nearby foreign destinations, known as sky cruises. Resort could offer conventional charter service but no other scheduled service. The market for sky cruises was limited and quite unprofitable, so the vast majority of Resort's business was charters, and for several years, only charters. At the time, the US did not have pure charter carriers, but rather supplemental air carriers, which at the time had a limited ability to offer scheduled service. Since Resort was functionally a pure charter carrier, it had in some ways the most restrictive certificate in the US airline industry. The airline ceased operations in 1960 at which time it tried selling its certificate to Trans Caribbean Airways. But in 1961 the CAB rejected the deal and revoked the moribund carrier's certificate.
Mackey International (MI) was a US airline, initially flying under commuter regulations until it was certificated in 1978 as an international scheduled airline by the Civil Aeronautics Board (CAB), the now-defunct Federal agency that, until 1979, tightly regulated almost all commercial US air transportation. MI's founder was Joseph C. Mackey, who earlier founded Mackey Airlines, which flew similar routes until sold to Eastern Air Lines in 1967. Through 1978, MI flew between Florida, the Bahamas, Turks and Caicos and Haiti under a number of names, including Mackey International Air Taxi, Mackey International Air Commuter and Mackey International Airlines. However, the legal name remained Mackey International. MI grew during the early 1970s but never achieved profitability. In 1977, its offices were destroyed by a terrorist bomb.
Aerovias Sud Americana dba ASA International Airlines (ASA) was one of the first cargo airlines to fly between the United States and Latin America, a US carrier certificated to fly air freight on a scheduled basis between Florida and Latin America in 1952 by the Civil Aeronautics Board (CAB), the now-defunct Federal agency that, at the time, tightly regulated almost all US commercial air transportation. ASA was undersized relative to contemporary freight airlines, but operated successfully in the 1950s nonetheless. Thereafter political instability, changing regulations and regulatory inertia impacted ASA and it failed to make the transition to jets. The CAB denied attempts by Riddle Airlines to merge with ASA before and after ASA collapsed in 1965.
North American Airlines Group or North American Group, dba North American Airlines was a "combine", a group of US irregular air carriers and related companies under common control that acted as an early scheduled low-cost carrier in the period 1949–1957. It can be seen as a form of virtual airline.