American Airlines Flight 320 was a scheduled flight between Chicago Midway Airport and New York City's LaGuardia Airport. On February 3, 1959, the Lockheed L-188 Electra performing the flight crashed into the East River during its approach to LaGuardia Airport, killing 65 of the 73 people on board. Weather conditions in the area were poor, and the aircraft passed through dense clouds and fog during its descent. As it approached the runway, it flew lower than the intended path and crashed into the icy river 4,900 feet (1,500 m) short of the runway. At the time of the crash, American Airlines had been flying the newly developed Lockheed Electra in commercial service for only about two weeks, and the accident was the first involving the aircraft type.