Southwest Area Fleet was created in 1942.
Northeast Area Fleet was created in 1943.
Southeast Area Fleet was created in 1942.
Central Pacific Area Fleet was created in 1944.
Southwest Airlines' fleet currently consists of 570 aircraft in service. These are all Boeing 737s, and include 300, 500, 700 and 800 variants. They have placed orders for a further 338 aircraft, to be added to the fleet at some point in the future.
Northern Fleet was created in 1933.
Fleet Buzz was created in 1995.
Baltic Fleet was created in 1702.
Sydney Fleet was created in 2007.
Fleet Defender was created in 1994.
Fleet Command was created in 1999.
Undersea Fleet was created in 1956.
Combined Fleet was created in 1894.