Wilmore and Williams, both former U.S. Navy test pilots, expected to remain in orbit for about 10 days on the mission, which was called Crew Flight Test (CFT). The main goal was to show that Starliner is ready to carry astronauts to and from the ISS, so that the spacecraft can start flying operational, long-duration missions in the near future.

Williams, Wilmore, Hague and Gorbunov are part of the Crew-9 mission, a routine staff rotation jointly operated by NASA and SpaceX. The Crew-9 capsule launched to the space station in September with Hague and Gorbunov riding alongside two empty seats reserved for Williams and Wilmore,