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.

Butch Wilmore and Suni Williams will not leave the ISS before Wednesday, NASA reported, pending weather conditions at splashdown sites near Florida.