UST is a unique code, commonly called an IATA code, used in the aviation industry to identify airports. This code, along with many others, are defined by IATA (International Air Transport Association). A UST flight refers to a flight to St. Augustine Northeast Florida Regional Airport.
For a flight to St. Augustine, you will be flying into Northeast Florida Regional. St. Augustine Northeast Florida Regional (UST) is just 7.5 km from the centre of the city.
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