After the first 737 rolled out on January 17, 1967, it underwent many variations, leading up to Boeing's Next Generation (NG) variants. The longest of the 737NG family is the Boeing 737-900.

Rough beginnings The 737-900 started out as a rather lackluster program compared to other variants. It was announced in June 1997 as a competitor to the Airbus A321. Boeing extended the fuselage ...