Most likely Punta Arenas Airport also known as Presidente Carlos Ibáñez International Airport. (IATA: PUQ, ICAO: SCCI)
Chilean air force shares the airport so this would explain the bunkers.
Airport is near the southern tip of Chile close to Antarctica.
https://en.wikipedia.org/wiki/Presidente_Carlos_Ib%C3%A1%C3%B1ez_del_Campo_International_Airport