United Airlines fleet
operates 801 aircraft, giving it the third largest commercial airline fleet in the world. It primarily operates a mix of Airbus and Boeing narrowbody and widebody aircraft.
Current fleet
, United Airlines' fleet consists of the following aircraft:Historical fleet
Formerly operated
| Aircraft | Total | Introduced | Retired | Notes |
| Boeing 40A | 1927 | 1937 | Launch customer Operated by Boeing Air Transport and Varney Air Lines | |
| Boeing 80A | 1928 | 1934 | Launch customer Operated by Boeing Air Transport | |
| Boeing 247 | 1933 | 1942 | Launch customer All 59 of the base model were built for United Airlines | |
| Boeing 377 Stratocruiser | 1954 | |||
| Boeing 720 | 1960 | 1976 | Launch Customer. | |
| Boeing 727-100 | 126 | 1963 | 1993 | |
| Boeing 727-200 | 104 | 1968 | 2001 | |
| Boeing 737-200 | 101 | 1968 | 2001 | Launch Customer |
| Boeing 737-300 | 103 | 1986 | 2009 | |
| Boeing 737-500 | 102 | 1990 | 2009 | Several 737-500s were taken over from the merger with Continental Airlines. |
| Boeing 737-500 | 102 | 2011 | 2013 | Several 737-500s were taken over from the merger with Continental Airlines. |
| Boeing 747-200 | 23 | 1970 | 1999 | |
| Boeing 747-200B | 10 | 1987 | 2000 | |
| Boeing 747SP | 11 | 1985 | 1995 | Taken over from Pan American World Airways. |
| Boeing 747-400 | 44 | 1989 | 2017 | |
| Boeing 767-200 | 35 | 1982 | 2005 | Launch Customer. |
| Boeing 767-200ER | 16 | 2011 | 2013 | Inherited from Continental Airlines. Some aircraft were sold to Russian operators and airlines in developing nations. |
| Convair 340 | 50 | 1952 | 1968 | |
| Douglas DC-3 | ||||
| Douglas DC-6 | 1947 | 1970 | Fleet included DC-6 and DC-6B aircraft | |
| Douglas DC-7 | 57 | |||
| Douglas DC-8 | 121 | 1959 | 1992 | Fleet included stretched DC-8 "Super 60" series and re-engined "Super 70" series aircraft. |
| Ford Trimotor | Operated on a transcontinental route between New York City and San Francisco. | |||
| Lockheed L-1011 TriStar | 6 | 1986 | 1989 | Taken over from Pan American World Airways. All aircraft were transferred to Delta Air Lines |
| McDonnell Douglas DC-10-10 | 48 | 1971 | 2001 | Launch Customer. |
| McDonnell Douglas DC-10-30 | 11 | 1983 | 2001 | Four aircraft converted into freighters for the short-lived "United Airlines Worldwide Cargo" service. |
| Sud Aviation Caravelle | 20 | 1961 | 1970 | Only U.S. operator in scheduled passenger service |
| Laird Swallow J-5 | Single seat biplane used to carry US Air Mail by predecessor Varney Air Lines. | |||
| Vickers Viscount | 48 | 1955 | 1969 | Former Capital Airlines aircraft. Only mainline turboprop aircraft type ever operated by United Airlines. |