Christiansted Harbor Seaplane Base also known as St. Croix Seaplane Base, is located in the harbor by Christiansted, Saint Croix, U.S. Virgin Islands. This private-use airport is owned by the Virgin Islands Port Authority. The sea base is home to Seaborne Airlines U.S. Virgin Islands, the only multi-engine sea plane airline operating in the United States.
The airport is close to Charlotte Amalie, Road Town, Ceiba, Fajardo, Naguabo, Humacao, Luquillo, Yabucoa, Las Piedras, Juncos, Río Grande, San Lorenzo, San Isidro, Arroyo, Gurabo, Guayama, Caguas, The Bottom, Coco, Salinas from Puerto Rico, U.S. Virgin Islands, Netherlands, British Virgin Islands.