Virgin America
Virgin America is also offering a 20% off coupon Main Cabin travel on select routes from non-stop routes to/from San Francisco and Los Angeles: Dallas, Washington Dulles, Chicago, Portland, Palm Springs and Philadelphia when you like their Facebook page and fill out a quick form. The discount code gets emailed within minutes. Travel must occur between January 7, 2013 and March 13, 2013. Blackout dates are Jan 18, Jan 21, Feb 15, and Feb 18, 2013.
http://vgn.am/guilttrip