Polonia International Airport (Indonesian: Bandar Udara Internasional Polonia) (IATA: MES, ICAO: WIMK) was the principal airport serving Medan, North Sumatra, Indonesia, about 2 km from the downtown. It served 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. In terms of passenger numbers, Polonia was the fourth largest airport in Indonesia after Soekarno–Hatta, Juanda, and Ngurah Rai.