no US passport needed

USA Today puts St John on Yet Another List

No US passport = no problem for you to enjoy St John
Trunk Bay
USA Today and Smarter Travel have highlighted 5 Exotic Places you can go without a US passport. Are you longing for a long-distance getaway but don't have a passport? No problem! USA Today found five faraway places overseas where, according to U.S. Customs and Border Protection, you won't need to bring a passport. The one that is closest to our hearts (and, pretty easy to get to from the mainland US) is:

United States Virgin Islands

The U.S. Virgin Islands lie mere minutes away from Puerto Rico by plane. Made up of three main islands—St. Thomas, St. Croix, and St. John—plus a scattering of smaller isles, the U.S.V.I. see some 2.6 million visitors each year. In fact, tourism and rum (things we think go very well together) make up the majority of the islands' economy. Each island has its own unique appeal. St. John, with its national parkland and legendary diving, will charm true escapists. St. Thomas is a shopper's dream, with countless boutiques and jewelers, as well as two bustling cruise terminals. And Dutch-flavored and diverse St. Croix is a favorite of luxury-seeking honeymooners. Find accommodations of every stripe, from St. Thomas' smart Ritz-Carlton to the luxe and immersive Caneel Bay resort on St. John [also, lots of private villas, including ours on St John -- Great Expectations]. 

Note: Travelers will need to have a passport to visit the neighboring British Virgin Islands.

Oh yes, I should mention the other 4 islands that made the list. They are: Northern Mariana Islands, Guam, American Samoa, and our neighbor to the west Puerto Rico.