The Next-Generation 737-900ER (Extended Range) is the latest member of the 737 airplane family, the world's best-selling jetliner family. Aerodynamic and structural design changes such as an additional pair of exit doors and a flat rear pressure bulkhead increase interior volume. The airplane is capable of carrying up to 180 passengers in a two-class layout and is certified for up to 220 passengers in a one-class layout.
The 737-900ER shares the same performance attributes of the other models of the Next-Generation 737 family (737-600, 737-700 and 737-800): reliability, lower maintenance costs, lower operating costs and optional state-of-the-art flight deck systems such as Head-Up Display (HUD), Global Positioning Landing System and Vertical Situation Display.
The 737-900ER also has the same advanced-technology wing design that helps increase fuel capacity and efficiency. The advanced wing airfoil design provides an economical cruise speed of .791 Mach (525 mph).