Not the same thing, but there were said to be whole squadrons of B17s and other types parked on Swedish (and Swiss?) airfields towards the end of the war.
I seem to remember reading about a lot of shot up allied aircraft diverting into neutral Switserland to avoid captivity. One story I remember is that a shot up B17 escorted by a Swiss AF Me 109 towards a Swiss airfield was "helped" by a well meaning P51 who shot the Me 109 down.