At 20 feet (6 m) longer than the 787-8, the 787-9 will extend the 787 family in both capacity and range, carrying 40 more passengers an additional 300 nautical miles (555 km). The 787-9 leverages the visionary design of the 787-8 such as its exceptional environmental performance — 20 percent less fuel use and 20 percent fewer emissions than similarly sized airplanes — and passenger-pleasing features.
With the second and third airplanes in final assembly, Boeing and the 787-9 are on track. First delivery to launch customer Air New Zealand is set for mid-2014.
Source: Boeing.com