Chicago and Southern Air Lines Flight 4 was a regularly scheduled flight from New Orleans, Louisiana to Chicago, Illinois, via Jackson, Mississippi, Memphis, Tennessee, and St. Louis, Missouri, operated with a Lockheed Model 10 Electra. On August 5, 1936, after departing from Lambert-St. Louis International Airport, the flight crashed in a farm field near the Missouri River. All 6 passengers and 2 crew members were killed in the crash.