Spirit, interjet, volaris, viva aerobus start fare war at IAH with united
 

Spirit's massive expansion plus viva aerobus, Internet, and volaris entering the market have caused a huge fare war with United on certain Latin American destinations, particularly cancun and guadalajara.

Spirits impact is more because they fly domestically and to other countries like Belize, Costa Rica, Nicaragua, and Honduras.

Good for customers.

I have not seen any cheap fares on MEX,GDL to IAH yet...Actually direct flights are very expensive.

I booked $271 to GDL round trip nonstop. Also I see $268 to MTY and $311 to QRO

From MEX> USA the fares are north of 500 USD in the cheapest days...

This weekend I stumbled onto MEX-IAH for $271 on AM or UA. (Believe Interjet had fares at this price as well.) Not sure who started the sale, but I'd guess that it's in response to Spirit, which begins flying Mexico City (TLC Toluca) to Houston in May.

Now that the sale is over, UA is back to a ridiculous $669, which AM matches on the non-stop flight. If you're willing to connect in MTY however, AM will sell for the route for ~$385.