Alaska Airlines Flight 1866 was a regularly scheduled flight from Anchorage, Alaska to Seattle Washington, with intermediate stops. On September 4, 1971, the aircraft serving the flight crashed into a mountain in Haines Borough, near Juneau, Alaska (JNU/PAJN) on approach for landing. 111 people were killed. It was the first fatal jet airliner crash of Alaska Airlines, and the worst single plane crash in the history of the United States until June 24, 1975, when Eastern Airlines Flight 66 crashed. To date it is the worst accident in Alaska Airlines history.