According to data from Planespotters, American's average fleet age is only about 10.8 years. The oldest of these are the Airbus A320-200s. The oldest of these, N647AW, N649AW, N102UW, N650AW, and N651AW, are all 22-years-old. All of these jets are legacy America West planes, which merged with US Airways back in 2005.