Exercise Red Flag is an advanced aerial combat training exercise held at Nellis Air Force Base, Nevada, US.

The exercise offers realistic air-combat training for military pilots and other flight crew members from the U.S., NATO and other allied countries.

The exercise began in the year 1975. The origin of the exercise is traced to the unacceptable performance of U.S. Air Force fighter pilots and weapon systems officers (WSO) in air combat manoeuvring (ACM) (air-to-air combat) during the Vietnam War.