Boeing Starliner

The Boeing CST-100 Starliner is a spacecraft designed to carry crew to and from the International Space Station and other low Earth orbit destinations, built by Boeing under NASA's Commercial Crew Program. It consists of a reusable crew capsule and an expendable service module, is slightly larger than the Apollo command module or the SpaceX Crew Dragon but smaller than Orion, and can seat up to seven although NASA plans to fly no more than four. It is launched on an Atlas V N22 rocket from Cape Canaveral Space Launch Complex 41 and can stay docked to the station for up to seven months. NASA awarded Boeing a 4.2 billion dollar fixed-price contract in 2014. The first uncrewed Orbital Flight Test in December 2019 and the second in May 2022 were each judged partial failures, and in June 2024 thruster problems on the Crew Flight Test led NASA to return the capsule uncrewed that September.