American Airlines was the first US major carrier to order the MD-80 when it leased twenty 142-seat aircraft from McDonnell Douglas in October 1982 to replace its Boeing 727-100s. It committed to 67 firm orders plus 100 options in March 1984, and in 2002 its fleet peaked at more than 360 aircraft, % of the 1,191 produced. It announced that it would remove all of its MD-80s by 2019, replacing them with 737-800s. The airline flew its final MD-80 revenue flights on September 3 and 4, 2019 before retiring its 26 remaining aircraft. The final MD-80 flight on September 4, 2019 flew from Dallas/Fort Worth to Chicago–O'Hare.