my mom goes on repositioning cruises. so where they need to move a boat from one port to another for starting a cruise line trip etc.
She did HI to Australia over a course of a month, hit up all the places down there; New Zealand, Fiji, etc. Her flight home from Australia cost more than the entire boat trip, all things included.
She has another one planned later this year; leaves out of New Jersey, will go to Spain, Portugal, France and end up in Italy before making the flight home. The boat, room, all things paid for on the boat = $1300 per person.