At this point I think everyone should be using passports. While they may not strictly be required for your cruise, they are required to fly back into the US. So if anything should happen that requires you to fly home from one of the foreign ports, you would be in trouble. Just my opinion. There are many posts on this subject and you may want to do a search and check some of them out.
Passport Clarification Needed..
in Ask a Cruise Question
Posted
Hi and welcome to the boards.
At this point I think everyone should be using passports. While they may not strictly be required for your cruise, they are required to fly back into the US. So if anything should happen that requires you to fly home from one of the foreign ports, you would be in trouble. Just my opinion. There are many posts on this subject and you may want to do a search and check some of them out.