If you sail alone, you will usually pay more for your cabin — as much as the full double-occupancy rate. So shop smart. This so-called “single supplement” may be reduced (up to 50 percent) during periodic promotions from cruise lines, or might be waived altogether under special offers. You can also find big savings if you're willing to share a cabin. Travel agencies that specialize in solo travel will connect cruisers who want to share a stateroom, and cruise lines can hook you up, too. Holland America's Single Partners Program matches up same-sex, nonsmoking singles, and the two of you each pay the per-person, double-occupancy rate. If they can't find a suitable match, you get the cabin for yourself at the lower rate.
It's not just ocean going ships that accommodate single travelers. River line Uniworld waives or reduces single supplements for their cruises, and the all-inclusive rates cover group walking tours or biking excursions where you can mingle with fellow passengers.