[El Gato]

Even more, Auschwitz was in the Russian sector of war. Under no circumstances would Stalin had allowed such an action. I'm doubtful that any Allied aircraft would have had the range to hit Auschwitz, anyway.

Not from England, but from bases in France or especially Italy, they probably could.

However Auschwitz was not the only death camp, just the most famous. Others were in Germany itself.

[Skooz]

Even if the Air Corps could have reached Auschwitz from a base in far northern Italy, they would have still had to fly through Soviet occupied air space to bomb the camp. Even if the Soviets allowed this (not a chance), such a raid would have accomplished nothing.