FSX/Prepar3D – Scenery MMRX-Reynosa, Mexico, photoreal. General Lucio Blanco International Airport (IATA: REX, ICAO: MMRX) is an international airport located at Reynosa, Tamaulipas, Mexico, near the U.S./Mexico border. It handles national and international air traffic for the city of Reynosa. The airport is named in honor of General Lucio Blanco, a major figure of the Mexican Revolution of 1910 to 1920. By Fernando Angel G.