We're so confident you'll enjoy your Carnival cruise vacation, we guarantee it. Carnival is the only cruise line to offer the Vacation Guarantee*. Simply book your cruise vacation and sail away on a "Fun Ship." If you are not completely satisfied with your cruise vacation experience, all you need to do is notify us before arrival at the first port of call and you must debark at your ship's first non-U.S. port of call. Carnival will refund the unused portion of your cruise fare and pay your flight back.
Who would use that? ...aside from power outage or a ship wreck? How bad is your trip in the first day that your ready to leave and go home.
I guess if you had a family emergency at home and no travel insurance you could claim you hate the ship and have carnival not only refund you but fly you home lol.