The winners: Orbitz. SFO to JFK is a nonstop flight, and whereas it isn’t the most cost effective airfare, Priceline’s Specific Deal means you have got a morning takeoff between 6AM and 2PM and one most layover of six hours. Whereas this can be okay with some folks’s schedules, it isn’t a winner in my books. For the SFO to SEA flight, Orbitz or Priceline – similar worth, similar airline.