The astronauts who flew aboard the Boeing Starliner for its maiden crewed voyage undocked Tuesday morning from the ISS and are on their way home.

With a fresh crew now aboard the International Space Station, the four fliers they are replacing — including long-delayed Starliner astronauts Barry "Butch" Wilmore and Sunita Williams — undocked early Tuesday for a long-awaited return to Earth,

SpaceX's ninth operational crew return from the International Space Station is set to splash down on Tuesday, March 18, at about 5:57 p.m. EDT (2157 GMT).