If I were in your shoes, I'd start with farecompare.com, specifically http://www.farecompare.com/maps/comp...SFO&airline=UA. This lets you quickly see fares to many destinations at once, all on UA. Keep in mind, though, it isn't perfect...you may find when you click all the way through certain fares don't materialize. Once you find some potentially good routes, then move over to dot bomb or seatcounter.com to check for upgrade inventory.