Toncontín Airport (IATA: TGU, ICAO: MHTG) formerly Toncontín International Airport, also known as Teniente Coronel Hernán Acosta Mejía Airport is a civil and military airport located 6 km (4 mi) from the centre of Tegucigalpa, Honduras.

The History Channel programme Most Extreme Airports ranks it as the second most extreme airport in the world. The approach to the airport is considered to be one of the most difficult in the world to all aircraft, especially in inclement weather conditions.

Since the 19th century, the plains south of Tegucigalpa became known as the "Potrero Los Llanos", part of a farm adjoining the farm Loarque. In these areas, some political events took place. José Santos Guardiola defeated General José Trinidad Cabañas, seizing presidency of the republic. "El Llano" as it was known, is to the south end of Comayagüela. On a road to the south is the field that served for the takeoff and landing of aircraft. Currently, this forms the Hernán Acosta Mejía (HAM) Air Force base. The first landing was in 1921 when a single-engine plane from the Bristol Aeroplane Company landed with Captain Dean Ivan Lamb in command. He was received by President Rafael López Gutiérrez who broke a bottle of champagne on one of the aircraft's propellers.

The origin of the name Toncontín is unknown, but experts say that it is a word derived from the Nahuatl word "Tocotín", the name of an ancient and sacred dance of Yucatán in Mexico.

Aviator Luigi Venditti conducted several flights using the natural floodplain from Toncontín. Jose Villa, an Italian national, was another precursor of Honduran aviation who conducted flights from Toncontín, as did Starnaivola, Enrique Massi, Ball, and Clarence H. Brown.

The civil war in 1924 caused President Tiburcio Carías Andino to realise that aviation had a great future in Honduras, providing an ideal transport solution for the mountainous country, as well as being a strategic military weapon. For these reasons and with the growth of commercial aviation and the emergence of the Honduran Air Force, General Tiburcio Carías acquired the land that was to become Toncontín Airport in 1933. On January 5, 1934, the airport was inaugurated with the landing of a Douglas DC-3 from Pan American World Airways. Months later TACA opened "Hotel Toncontín" to accommodate passengers in transit, and Pan-Am built a hangar.

During the Football War of 1969, Toncontín Airport was a major target for the Salvadoran Air Force, and was bombed on several occasions, thus preventing the Honduran Air Force from launching its aircraft. The airport was repaired in a matter of days, and the Hondurans countered, making good progress.

The airport received much notoriety as being one of the most dangerous in the world due to its proximity to mountainous terrain, its short runway, and its historically difficult approach to runway 02. For years efforts were made to replace it with Soto Cano Air Base in Comayagua, which did not occur until 2021 when Comayagua International Airport opened there. In the meantime, Toncontín was significantly improved by the work of the Airport Corporation of Tegucigalpa (ACT) and InterAirports, a company contracted by the Honduran government to administer the country's four major airports.