<P> As of 28 February 2018, the Delta Air Lines mainline fleet comprises 855 aircraft in service, making it one of the largest airline fleets in the world . Before merging with Northwest Airlines in 2009, Delta Air Lines operated an all - Boeing and McDonnell Douglas fleet; it incorporated Northwest's Airbus aircraft into its fleet following the merger and subsequently ordered further Airbus types . Delta is known for its policy of generally buying older generation or used aircraft and for continuing to fly aircraft for 20 - 30 years, much longer than most other major airlines . As such, it has one of the oldest fleets of any American airline, with an average fleet age of 17 years as of 2017 . Fellow U.S. legacy carriers American Airlines and United Airlines have younger fleets; as of December 29, 2016, American had an average fleet age of 10.3 years, while United had an average fleet age of 14.1 years. . </P> <P> As of February, 2018, Delta's fleet consists of 855 Airbus, Boeing, and McDonnell Douglas aircraft . Delta's 483 Boeing aircraft make up about 56% of its fleet, while its 206 Airbus aircraft makes about 24% and 166 McDonnell Douglas aircraft makes up about 20% . Delta's 708 narrow - body aircraft comprise about 83% of its fleet, while its 147 wide - body aircraft comprise the remaining 17% . </P>

How many planes are in the delta fleet