We've done Hawaii 3 times, Tahiti once, and now we're off to Australia for a 31 day Sydney to San Francisco. We fly from Michigan and have learned to break up the flights. For Hawaii and Tahiti we flew to LA and spent the night. We then went the last leg the next day and well rested from the first flight. For Australia we're flying from Michigan to San Francisco, spending the night, then off to Hawaii for one night, then the last leg, about 10-11 hours to Sydney. Breaking it up like this makes it more bearable.