How long does the Artemis mission last?

The distance between Earth and the Moon is large enough that chemical rockets need several days. The upper stage gives the Orion spacecraft a single powerful boost, and afterward it flies without propulsion until lunar gravity deflects it. How long that journey lasts is a trajectory-planning decision, not a law of nature: going faster means more fuel for braking and for the return trip, going slower means larger reserves, more time exposed to radiation, and a longer strain on the systems.

The first crewed flight is designed as a mission of about ten days with four people on board. After the outbound leg, a free-return trajectory loops around the Moon; it is chosen so that gravity sends the capsule back toward Earth even without any additional maneuver, which offers safety in case of a failure. At no point is entering lunar orbit intended. The rest of the time is spent on tests: life support, navigation, manual piloting, and long-distance communications.

The first flight, uncrewed, launched on November 16, 2022, and splashed down on December 11, 2022. Without a crew there is no reason to hurry, and the goal was different: a distant retrograde lunar orbit, weeks of operation of all systems, and a return at maximum reentry speed. Future landing flights fall between these two patterns, because crews must transfer to a descent module and spend time on the surface; as a result, both duration and supply needs increase (data as of September 2026).