210 days docked, 60 hours free flight.
The Boeing CST-100 Starliner (Crew Space Transportation) crew capsule is a spacecraft design under construction by Boeing as their entry for NASA's Commercial Crew Development program. Its primary purpose is to transport crew to the International Space Station and to private space stations. It is launched on United Launch Alliance Atlas V Rocket.
The design draws upon Boeing's experience with NASA's Apollo, Space Shuttle and ISS programs as well as the Orbital Express project sponsored by the Department of Defense. A variety of validation tests have been underway on test articles since 2011. The uncrewed orbital flight test launched on December 20, 2019, but after deployment, an 11-hour offset in the mission clock of Starliner caused the spacecraft to do a large engine burn, consumeing to much fuel, to reach the International Space Station, leading to an early return. A second uncrewed orbital flight test launched on May 19, 2022, which successfully reached the International Space Station.