El Tari International Airport (Indonesian: Bandar Udara Internasional El Tari) (IATA: KOE, ICAO: WATT) is an airport in Kupang, East Nusa Tenggara, Indonesia. The airport is named after El Tari, the governor of East Nusa Tenggara from 1966 to 1978. The airport's ICAO code was changed from WRKK to WATT in 2004. As of December 2018, there were at least 258 outbound flights per week from the airport.
The airport is currently undergoing an expansion program. Two aero-bridge will be added and the terminal area will be expanded from current 7,400 square meters to 15,900 square meters. The terminal will be built into two floors with waiting rooms at the upper floor.