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 NASA astronauts who crewed the Boeing Starliner could be on their way home sooner than expected due to weather conditions off the Florida coast.

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

The four newcomers — representing the U.S., Japan and Russia — will spend the next few days learning the station's ins and outs.