20% off flights to Mexico on American

American is running a 20% off sale right now all on flights between the US and Mexico.  This includes Los Cabos, Puerto Vallarta, Cancun, Cozumel, and Acapulco.  It is valid for travel from 11/25/07 through 12/21/07. 

You must book your tickets on American Airlines website by 10/9/07 at midnight and enter in promotion code DFMXPLSFALL2 to take advantage of this offer. 

Here is a sampling of fares that are currently available on AA to these destinations:

Tampa (TPA) Cancun (CUN) $274
MIA (MIA) Cancun (CUN) $281
Los Angeles (LAX) Los Cabos (SJD) $294
Houston (IAH) Acapulco (ACA) $334

*Note that above prices include all taxes, but the 20% discount is off of the base fare before tax

Keep in mind that it is sometimes easiest to use Orbitz's flexible date search to find the cheapest dates to travel, and then plug those dates into the AA.com website to take advantage of the promotion.