San_Marcos_Municipal_Airport
San Marcos Regional Airport
Public airport located in Caldwell County, TX, US
San Marcos Regional Airport (ICAO: KHYI, FAA LID: HYI) is a public use airport located in Caldwell County, Texas, United States. It is four nautical miles (7 km) east of the central business district of San Marcos, a city that is mostly in Hays County. The airport is owned by the City of San Marcos and operated by Texas Aviation Partners.[1] It is located east of the border of Caldwell County and Hays County.[2] Before it was operated as a civilian airport it was known as Gary Air Force Base.
Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned HYI by the FAA but has no designation from the IATA.[3]