Northeast Florida Regional Airport (IATA: UST, ICAO: KSGJ, FAA LID: SGJ), is located approximately four miles (6 km) north of historic St. Augustine, in St. Johns County, Florida, United States. NFRA serves as a key connection point for air travel in the Northeast Florida region. It is a public airport managed by the St. Johns County Airport Authority on behalf of the citizens of St. Johns County. Airport facilities include both commercial and general aviation terminals.

Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but Northeast Florida Regional Airport is SGJ to the FAA and UST to the IATA (which assigned SGJ to Sagarai, Papua New Guinea).