Seaborne Airlines makes Island-Hopping Convenient, Fun and Hassle-Free! Fly the iconic seaplane from downtown St. Croix (Christiansted) to downtown St. Thomas (Charlotte Amalie), or make a connection from our San Juan, PR hub. Serving the Caribbean for over 23 years, Seaborne’s airport service flies to 17 destinations throughout the Caribbean. Our aircraft fly under the same strict regulations as major US carriers, with several flights throughout the day. If you plan to travel between the islands frequently, for business or with family, Seaborne Corporate rates are available. For full information about traveling with Seaborne, and to book online, visit our website or call toll-free.