Sultan Aji Muhammad Sulaiman Sepinggan International Airport (Indonesian: Bandar Udara Internasional Sultan Aji Muhammad Sulaiman Sepinggan) (IATA: BPN, ICAO: WALL), also known as Sepinggan Airport, is an international airport serving the city of Balikpapan and adjacent areas of East Kalimantan, located in Kalimantan, Indonesia. The airport began its new operational phase on 6 August 1997, with a new building and runway structure, replacing the old structure on the same site. The airport is oper…