Fares have steadily dropped the past few weeks on the SFO-CUN route - now down to $238 RT, taxes included. Fare is currently offered by Mexicana Airlines, and is valid through end of schedule (EOS) next year, including peak travel days. To book, visit
www.mexicana.com. Watch the layovers - some are short, others are quite extensive - and Mexico City airport is not the most exciting place to lounge between flights.