Iran Aseman Airlines Flight 3704 was a scheduled Iranian domestic passenger flight from Iranian capital Tehran Mehrabad International Airport to Yasuj in southwest Iran. On 18 February 2018, during its approach to Yasuj, the aircraft serving the flight, an ATR 72-212, operated by Iran Aseman Airlines crashed into Mount Dena in the Zagros Mountains near Noqol village in Semirom county, Isfahan Province. All 60 passengers and 6 crew members on board were killed.