US legacy carriers compared on fleet variety across mainline operations
A comparison of American Airlines, Delta Air Lines and United Airlines finds the three largest carriers differ in how many aircraft types their mainline fleets contain, despite shared use of the Airbus A320 family and Boeing 737.
Airbus A320 (all variants)Boeing 737 (all variants)
American Airlines, Delta Air Lines and United Airlines are the world's three largest carriers by size, and each runs hubs across the United States. All three fly the Airbus A320 family and the Boeing 737, but their fleets are not alike.
The narrowbody line-ups differ in how they are put together. The long-haul fleets vary more widely still.
The comparison turns on how many distinct aircraft types each mainline fleet contains.
Sources
- simpleflying.comWhich US Carrier Operates The Most Aircraft Types In Its Mainline Fleet In 2026?