Thule Air Base or Thule Air Base/Pituffik Airport(IATA: THU,ICAO: BGTL), is the United States Air Force's northernmost base, located 1,207km (750mi) north of the Arctic Circle and 1,524km (947mi) from the North Pole on the northwest side of the island of Greenland. It is approximately 885km (550mi) east of the North Magnetic Pole.