Boeing 737 Next Generation
The 737-900 is the longest 737 ever made. Alaska Airlines got the first -900 on May 15, 2001. The 737-900 has the same MTOW as the −800. It also does not carry any more fuel. The 737-900 can carry more luggage but cannot fly as far. This meant that it could not be a rival to the Airbus A321.