I have been cleared for takeoff July 2 for ACA. The problem is airfare--$683 on Continental. I'm trying to use my United Miles to fly to Mexico City and then pick up a connection their but I am having trouble coordinating times with the airlines that I am aware of that fly between those two cities. Does anyone know of any airlines other than Mexicana, Aeromexico and Aviacsa that fly this route? My brain is fried after spending 3 hours trying to coordinate this last night.