"Caribbean islands are also within reach for budget-conscious travelers this spring, with airfares down 9% from this time last year, Hopper’s report says. St. Thomas in the US Virgin Islands has hotel rates of $300 on average per night and flights as low as $184 round-trip on Hopper. Plus, no passport is required for US citizens. Stay on St. Thomas to enjoy some of the best beaches in the Caribbean and world-class snorkeling, or hop around to the other US Virgin Islands, St. John and St. Croix."