Most single supplements are 150-200 percent of the lowest per person price available at the time you book the cruise. In other words, if the double occupancy rate for two people in a cabin is $500 per person for a four-night cruise, it can be $750 to $1,000 for a single cruiser to travel in their own private cabin.

In 2026, the cost of a singles cruise varies significantly based on whether you book a "Singles-Only" chartered event or a solo cabin on a standard sailing. A 7-night singles cruise in the Caribbean typically ranges from $1,200 to $2,500 per person. This often includes a "Single Supplement" fee—a surcharge that cruise lines charge solo travelers to occupy a double cabin. However, modern lines like Virgin Voyages, NCL, and Royal Caribbean have introduced dedicated "Studio" cabins designed for one person, which can lower the entry price to around $800 to $1,100 for a week-long trip. If you join an organized "Singles at Sea" group, you might pay a premium (around $200–$400 extra) for hosted events, private mixers, and "roommate matching" services that allow you to split the cost of a double cabin with a stranger of the same gender. High-end or luxury singles cruises to destinations like the Mediterranean or Alaska can easily exceed $3,500 when factoring in beverage packages, excursions, and specialty dining.