My friend and I wanted to do something different for spring break. We wanted to go on a cruise but I found out that alot of the cruise lines will only let you travel if you have a 21 year old with you. Disney and oceania will let 18+ travel but are very expensive. I heard there are other cruise lines that will let 18+ travel but im not sure what ones. I want to know what other cruise lines will let us travel alone with out someone 21?