That's a tricky question! "Apollo" refers to the entire NASA program, not just a single mission. To answer your question accurately, we need to be more specific.

Do you want to know:

* The total time spent in space by all Apollo missions? This would be a very long time!

* The duration of a specific Apollo mission? For example, the Apollo 11 mission (the one that landed on the moon) lasted about 8 days.

* The longest time a person spent in space during an Apollo mission? This was achieved by the Apollo 17 crew, who spent almost 12 days in space.

Please clarify your question so I can give you the right answer!