Answer :

The farthest distance is the Moon.
AL2006
In distance, it's something like maybe 245,000 miles ... corresponding to the
several Apollo missions during which a Command and Service module entered
lunar orbit and swung around the back side of the moon with astronauts aboard.

The farthest from Earth that a human has ever gone and walked on solid ground
is roughly 238,000 miles, corresponding to the six Apollo missions that landed
six pairs of astronauts on the near side of the surface of the moon, between 1969
and 1972 .

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