We just bought plane tickets on Mexicana for mid-March. They were $33 USD each way plus tax, in the end we paid $112 USD each RT. We've been watching prices for a while and this is a cheap fare. Just thought I would share the info in case anyone here had in mind to pop over to DF for a few days. Anyone have suggestions for what to do while there? This is a pleasure trip and we will rent a car.