Wick to Keflavik (Iceland) in a cherokee six - flight time 6 hours and a lot of cold water underneath. I also flew the next leg Keflavik to Narsarsuaq (Greenland) 5mins short of 6 hours, but with a ferry pilot sitting in the rh seat although I was able to log it P1. Then it all went wrong. One mag failed between Iceland and Greenland so had to wait for one to be sent, had to get back for work so flew down the back of a B757 to Copenhagen and then with Go to EGSS. The six made it to Danbury CT later that week with its owner and the ferry pilot. The owner is a friend of mine from university who now lives and works in the US - 3 kids hence needs the six. He uses it a lot last spring took it to the Bahamas - 13.5 hours each way stopping 4 times. Back to the point the transatlantic was a real experience!