The majority of US cruise lines have 18 as the gambling age. Shows like “Deal or No Deal” where the prize is money.Where do the gambling age restrictions apply? Some cruise lines increase this age to 21 when cruising in certain places such as Alaska – or more generally in US waters. On most mainstream cruise lines, guests must be 18 to gamble in the casino or take part in gambling in the form of Bingo. How Old Do You Have To Be To Gamble On A Cruise? The age restrictions can vary by cruise line and destination and – doesn’t always follow the regulations of the country that the cruise ship is visiting. If you are taking a cruise, you may be wondering how old you need to be to gamble in the onboard casino or play games like Bingo.