Phan Rang Air Base (also called Thành Sơn Air Base) is a Vietnam People's Air Force (VPAF) (Khong Quan Nhan Dan Viet Nam) military airfield in Vietnam. It is located 5.2 miles (4.5 nmi; 8.4 km) north-northwest of Phan Rang – Tháp Chàm in Ninh Thuận Province. It was seized by the People's Army of Vietnam (PAVN) in April 1975 and has been in use by the VPAF ever since.