For me the "sweet spot" is Cathay Pacific JFK-YVR. The flight timing can be a bit "off" for some folks, but being able to theoretically "save" a full day at home and catch an afternoon flight to JFK (or take the train instead of flying), and then have a flight I can sleep on is a wonderful option...and the price is right, too, especially vis-a-vis the "shock sticker" price attached to the flight under normal circumstances. It's just a bloody shame that there's no apparent way to pull the same rabbit out of a hat on Qantas JFK-LAX. This might be less of a wonder in a year or so (when B6 expands Mint) but it's still a lovely option whenever available.