I know it sometimes gets this low and this fare is a Sat out, Tues return but it is summer and I can't recall it being such a low price. It prices out Aug and Sept. Atleast $10 less than Jet Blue.

With nesting it would be a cheap way for Bay area flyers to get some segments and for MVPs it is 3000 miles per round trip at 2c a mile. Plus you get to sit in First Class.