These three companies also boast the largest fleets of commercial aircraft in the world, respectively ranked in that order. Neck-in-neck over the decades, these giants of the flying industry have ...

Around 49 percent of United's fleet is over 20 years old, while only 19 percent of it is 5 years or younger. Sun Country Airlines and Allegiant are next on the list with a median fleet age of 18.1 ...