How long does it take a rocket to reach the Moon?

ESA sums up the crewed case: the Apollo missions took about three days to reach the Moon. Apollo 11 illustrates this well, since its lunar module landed in the Sea of Tranquility at 102 hours, 45 minutes and 40 seconds after launch: to the outbound trip must be added lunar orbit insertion and descent. That timeline is a compromise between propellant use, safety and time, not a speed record. NASA's most recent crewed flight, Artemis II, launched on April 1, 2026 and flew past the Moon on April 6, on the sixth day of the flight, without entering lunar orbit.

Two opposite ways of traveling mark the extremes. New Horizons passed the Moon 8 hours and 35 minutes after launch, on its way to Pluto: it did not need to slow down, so it crossed the lunar distance at full speed and continued on its way. At the opposite end, SMART-1 launched on September 27, 2003 and was not captured by lunar gravity until November 15, 2004, a cruise of about 13 months. Its ion engine provides minimal but constant thrust, so the probe had to widen its Earth orbit lap by lap before finally being captured.

The distance barely changes: the Moon orbits between 350,000 and 400,000 kilometers from Earth. What changes is the energy available and what is planned upon arrival. A spacecraft that only flies past can accelerate without reservation; one that must stay in orbit or land has to arrive slowly enough to brake using the propellant it carries. That is why, at the Moon, going fast and stopping are competing goals, and why travel time says more about the mission plan than about the rocket.