What is the farthest distance a human has ever been from earth?

The farthest distance is the Moon.

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.