Southwest is flying once again from San Francisco and Southwest Airlines Rapid Rewards members who fly three roundtrips within California, or between San Francisco (SFO) and Las Vegas (LAS), will get one roundtrip free. The travel must be booked online between Aug. 27 and Dec. 31, 2007 and must be completed by Dec. 31, 2007. The award will be valid to any of over 60 destinations served by Southwest Airlines.

The fine print: Reservations made prior to Aug. 27, 2007 do not qualify for this promotion. Service between SFO and Los Angeles International Airport begins Nov. 4, 2007. Offer is not valid on Southwest Airlines Vacations packages and travel on ATA-only service is not eligible for this promotion. There is a limit of one free promotional award per member.