Approximately how long did it take for Apollo missions to reach the moon?

The Apollo missions typically took about three days to travel from Earth to the Moon. This duration was largely due to the trajectory and speed at which the spacecraft traveled. The missions utilized a "free-return trajectory," allowing them to take advantage of the Moon's gravitational pull, which enabled a faster transit without requiring extensive fuel consumption for orbital adjustments.

The spacecraft, traveling at an average speed of approximately 3,600 kilometers per hour (about 2,237 miles per hour), could enter the Moon’s gravitational influence and reach lunar orbit after this time frame. This duration allowed the crew to complete their necessary pre-landing checks and prepare for moon landing procedures.

In contrast, the other options suggest either too short or too long a duration. A one-day trip would be insufficient considering the velocities and physics involved, while five and seven-day options exceed the actual travel time observed during the missions.