A runway excursion is a runway safety incident in which an aircraft makes an inappropriate exit from the runway. Runway excursions include runway overruns, which occur when an aircraft is unable to stop before it reaches the end of the runway. Runway excursions can happen because of pilot error, poor weather, or a fault with the aircraft.

On July 1, 1965 Continental Airlines Flight 12 overran the runway while attempting to land at Kansas City Municipal Airport. No one was killed or seriously injured, but the accident forced discussions about runway safety in Kansas City and resulted in construction of a new airport, Kansas City International Airport, which opened in 1972. The accident also led to widespread implementation of runway grooving, which improves braking in wet landing conditions.