NASA on Tuesday swapped out the astronaut capsule it plans to use for an upcoming routine flight to the International Space Station, a scheduling move that will allow a slightly earlier return for two Starliner astronauts who have been on the station far longer than expected.

NASA will send astronauts Butch Wilmore and Suni Williams home from the International Space Station early on a previously used SpaceX Dragon space capsule, not on a brand-new one, the agency announced.