Cyril E. King Airport (IATA: STT, ICAO: TIST, FAA LID: STT) is a public airport located two miles (3 km) west of the central business district of Charlotte Amalie on the island of St. Thomas in the United States Virgin Islands. It is currently the busiest airport in the United States Virgin Islands, and one of the busiest in the eastern Caribbean, servicing 1,403,000 passengers from July 2015 through June 2016. The airport also serves the island of St. John and is additionally often used by those travelling to the nearby British Virgin Islands.

Although passports are not required for U.S. citizens who are visiting the U.S. Virgin Islands from other U.S. jurisdictions, all passengers bound for the continental United States and Puerto Rico must pass through U.S. Customs and Border Protection screening before boarding their flight. Private planes can either use CBP Preclearance or arrive in the continental United States or Puerto Rico as an international arrival.

The airport operates one main runway that is 7,000 ft × 150 ft (2,134 m × 46 m) long. The terminal operates 11 gates.