Southwest DING! Fares have been running about $41 each way from the Bay Area to Southern California all week. Today, they are specific from San Francisco to Ontario (good airport to fly into for a trip to Palm Springs) and Orange County (think Disneyland).
There are also great fares from Sacramento to Los Angeles and Ontario for $41/each way.
Travel is restricted to certain flights through the end of July 2008.
Want to know more about DING! Fares? (Hint: you won't find these on the Southwest website).
Click here for more information.