Flightfox is pretty awesome, but they're generally for more complicated itineraries that require searching over lots of different variables (e.g. dates, layover

Flightfox is pretty awesome, but they're generally for more complicated itineraries that require searching over lots of different variables (e.g. dates, layover, multiple stops, etc.). Hipmunk I've found is great for finding that quick flight from BOS<->SFO on dates I'm certain about. I imagine Hipmunk may expend the kind of usage cases they're optimized for as they grow.