- Wonsan Airport is an international airport located in Wonsan, Kangwon Province, North Korea. It is officially known as Kalma Airport and serves as a military and civilian airport. It was opened in 2015 and is one of North Korea's newest airports. Wonsan Airport has a single terminal building and offers domestic flights to other major cities in North Korea, as well as international flights to China and Russia. The airport is strategically important for tourism development in the eastern coastal region of North Korea.