Soewondo Air Force Base (Indonesian: Pangkalan Udara Soewondo) is currently a military airbase in Medan, North Sumatra, Indonesia. Before 2013, this airport served commercial flights, and was known as Polonia International Airport (Bandar Udara Internasional Polonia) (IATA: MES, ICAO: WIMK) which was the principal airport serving Medan, about 2 km from the downtown; it used to serve flights to several Indonesian and Malaysian cities, along with a flight to Singapore and Thailand. Previous international flights had been opened to Hong Kong, Taipei, Amsterdam, Phuket, Chennai, Johor Bahru, Malacca and Ipoh.

At the end of its service as civil airport, Polonia was the fourth largest airport in Indonesia after Soekarno–Hatta, Juanda, and I Gusti Ngurah Rai, in terms of passenger numbers. Passenger service charges for each passenger departing through the domestic terminal was IDR 35,000 ($4.1) and IDR 75,000 ($8.8) for the international terminal.

All flights and services from this airport shifted to Kuala Namu International Airport on 25 July 2013. Following the airport's opening, Polonia's ICAO code was changed from WIMM to WIMK, since WIMM is assigned for Kuala Namu.

Now as Soewondo Air Force Base, the airport belongs to the Indonesian Air Force. It hosts the Western Surveillance Wing including eight CN-235 tactical surveillance airplanes.