Cruising has quietly become one of the most appealing ways for single travelers to explore the world. With accommodations designed for solo guests, curated social programming and the freedom to be as social—or as independent—as you like, today’s cruise landscape offers far more than the traditional image of family-packed ships and assigned dinner tables. From adults-only sailings to adventure-focused itineraries, these are the best cruise options for single travelers departing from or catering to the U.S. market. Virgin Voyages has quickly positioned itself as a favorite among solo travelers seeking a lively, modern atmosphere. All ships are strictly 18+, eliminating family-oriented programming and replacing it with nightlife, immersive entertainment...