fishing for airline tickets

Israel's niece is getting married in the California wine country in February. We both wanted to go if we could travel inexpensively. Nothing was quite low enough the few times I checked. But last night when Virgin suddenly had $132 one-ways from DFW to SFO, I pounced: $550 for two roundtrips from DFW to SFO with $24 of travel insurance thrown in. I'm using frequent flyer miles for my commute flights to Dallas, so .5K is the total for 6 flights. Not too bad.