The four U.S., Russian and Japanese astronauts pulled up in their SpaceX capsule after launching from NASA’s Kennedy Space Center in Florida. They will spend at least six months at the orbiting lab, swapping places with colleagues up there since March. SpaceX will bring those four back as early as Wednesday.

The four Crew-11 crew members joined seven other astronauts in the International Space Station early Saturday morning following a 15-hour journey from Florida.

In a mission that underscores the growing reliability and speed of commercial spaceflight, SpaceX successfully delivered a multinational team of astronauts to the International Space Station (ISS) just 15 hours after launch,