The Boeing 787-9 Dreamliner is a two-engined long-range widebody airliner with a capacity of 257 - 290 passengers produced by the American manufacturer Boeing Commercial Airplanes. The 787-9 is a member of the Boeing 787 Dreamliner Familie (787-8, 787-9 und 787-10).

The 787-9 is a stretched variant of the Boeing 787-8 (+6,09 m / 20 ft). It is the second 787 variant to enter marked. The 787 is the world's first airliner using composite materials for most of its construction (approx. 50 percent). The fuselage is built as one-piece composite barrel construction. The 787 does not use any bleed air from the engines. Hydraulics systems, wing anti-ice, air conditioning and pressurization are electrical powered. Available engine options for 787-9: Rolls-Royce Trent 1000-A2, 1000-J2, 1000-K2, General Electric GEnx-1B74, -1B75P2.