The Boeing Starliner spacecraft successfully completed its uncrewed flight back to Earth, NASA announced overnight. The return ended the Starliner’s most recent flight test months later than intended and leaves its original crew, NASA astronauts Barry “Butch” Wilmore and Suni Williams, aboard the International Space Station until next year.

The three astronauts and one cosmonaut of the SpaceX Crew-10 mission docked with the International Space Station just after midnight ET Sunday, and at 1:35 a.m., opened the hatches between their Space Dragon spacecraft and the ISS,

The crew-swap mission will enable NASA’s Butch Wilmore and Suni Williams to return to Earth from the International Space Station.