The Corpus Christi International Airport has tried to attract airline service from Mexico, the latest attempt being in 2005. It had reached an agreement with Mexican airline Aeromar which planned to fly ATR 42s two or three times a week to Monterrey and had received U.S. Department of Transportation (USDOT) approval. However, in a later letter to USDOT, Aeromar stated it would not seek renewal of the permit. Aeromar serves McAllen, TX, with nonstop flights to Mexico City. In 1974, Texas International Airlines was flying Douglas DC-9-10s between Corpus Christi and Mexico City via McAllen, TX, and DC-9s twice a week to Tampico and Veracruz via McAllen in 1975. In 1967, Mexicana de Aviacion Douglas DC-6s flew nonstop to Mexico City via Monterrey three days a week.