We are doing the Radiance of the Seas in October from Vancouver to Hawaii. I tried to do ff miles for a flight from missouri to Vancouver and from Hawaii to Missouri. I was told that you would have to have the miles for round trip to both Hawaii and a round trip to Vancouver because a one way ticket costs more. I think this is major BS, but that was their final answer so we booked overpriced air with RCI. Going to cost the cruise lines a cruise someday, because I will probably do a land vacation with my miles.