Question: how old are passenger planes?
Answer: American Airlines has an average fleet age of 10.8 years, largely because of its aging 757s, 767s and MD-80s. United Airlines has an average fleet age of 15.1 years. Its short-haul A319/320 aircraft are, on average, about 20 years old, as are the midrange 757s and 767s and many of its 777-200s as well.