Yuma International Airport, designated IATA code YUM and ICAO code KNYL, is a joint-use facility shared between civilian commercial operations and Marine Corps Air Station Yuma (MCAS Yuma) in southwestern Arizona. The airport serves the Yuma metropolitan area and benefits from its proximity to the U.S.-Mexico border, drawing passengers from both sides. MCAS Yuma is one of the busiest military airfields in the world by flight operations, primarily due to year-round training activities enabled by Yuma's abundant sunshine and clear skies. The military mission and civilian operations coexist on the same runways and airfield infrastructure. Commercial service at Yuma is limited but connects the region to major hub cities. The airport handles a modest passenger volume relative to larger Arizona airports such as Phoenix Sky Harbor, serving primarily regional and connecting traffic.