A wise move, they have nothing to prove. Most single-engined fighters seem to come in a container these days, though that was not the case in the eighties and people like Doug Arnold would send Mustangs and Thunderbolts over ( or back ) via Greenland. His Mosquito also came, and went back that way.
Off hand, I can’t think of any that came to grief, though Jeff Hawke had a Me108 go down after 633 Sqdn. He was leading a flight of two to the USA ,and only one arrived!