Trans-Texas Airways (TTa) began flights to Mexico from the airport in 1967; in 1968 TTa had ten non-stop Convair 600s a week to Monterrey and direct six days a week to Tampico and Veracruz via Harlingen. In 1969 Trans-Texas changed its name to Texas International Airlines and in 1970 was flying daily Douglas DC-9-10s nonstop to Monterrey with a routing of Dallas Love Field (DAL) - Houston Intercontinental Airport (IAH) - Harlingen - McAllen - Monterrey. In 1974 Texas International DC-9s were flying nonstop to Mexico City, Dallas/Fort Worth - Houston Intercontinental - Corpus Christi - McAllen - Mexico City but no longer flew non-stop to Monterrey. In 1975 Texas International was flying non-stop DC-9s from the airport to both Tampico and Veracruz twice a week with these flights continuing on to Mexico City and then non-stop from Mexico City back to McAllen. By the late 1970s, Texas International was no longer flying from the airport to Mexico although the airline was continuing to fly DC-9s non-stop to both Houston and Dallas/Fort Worth.