Launching atop an Atlas 5 rocket in an "N22" variant* will be the second uncrewed flight test, OFT-2, of Boeing's Starliner spacecraft. It's set to be an end-to-end re-flight of the original OFT mission in December 2019. *The variant designation means it will have no payload fairing, two solid rocket motors and two engines on the Centaur upper stage. Note: The image used in this entry shows the 421 variant.

SpaceX's Crew-3 Dragon mission is slated to bring NASA Raja Chari and Thomas Marshburn as well as German astronaut Matthias Maurer and another yet-unnamed international astronaut. They'll replace outgoing astronauts from the Crew-2 flight and are expected to remain aboard the outpost for about six months before being replaced by the crew of the first operational CST-100 mission, Starliner-1, in early 2022.

Launching atop an Atlas 5 rocket in an "N22" variant* will be Boeing's first crewed CST-100 Starliner mission to the International Space Station. It will see NASA astronauts Barry Wilmore, Michael Fincke and Nichole Mann fly to the outpost for at least one or two weeks. *The variant designation means it will have no payload fairing, two solid rocket motors and two engines on the Centaur upper stage. Note: The image used in this entry shows the 421 variant.