There’s some really good fares right now on Virgin America, starting at just $39 one way. You can view all the fares from your desired cities, but I was looking at the ones from Portland, where I live. The travel dates extend well over into March, and have some incredible deals to the bay area. Most require a 14 day advance purchase, but the travel period is from November 1st to March 8th. The only caveat is THEY MUST BE BOOKED TODAY- October 18th! Plenty of great availability around Thanksgiving and Christmas. I might have to just spend New Year’s in San Francisco, at these rates! Happy Travels.