Are There Any Vacational Cruise Lines That Allow People 18 And Over To Travel AlonePosted on September 25, 2010.  A group of friends and I want to plan a cruise and we are all 19 ... However, MOST cruise lines require people under 21 to Travel with Someone Who Is Over The Age of 25 ... Are There Any cruise ships travel to the Caribbean That's that Will allow my friends and I to travel alone? CommentsEnriqueta Nordwall says... No value Posted on September 28, 2010 Leave a Comment |