Flighty sounds like it's got a lot of great features, but as an FYI for Isquare and for standby folks looking for what I mentioned: the free app "Flight Board" for iOS does that feature. Plug in the airport code or name, and it shows you all departures or arrivals to and from there, sorted chronologically. From there you can filter by city name, airline code, etc. You can also save a list of favorite airports, and just switch back and forth between them without having to do a new search.
was in Istanbul a couple weeks ago, looking for a way home, had planned on going through AMS, but it filled up. So instead I lit up that app, saw there was a flight I'd never heard of out of IST to CDG departing in a few hours. Checked the loads, jumped on, and poof - I was IST>CDG>SEA a short while later in first class.

Back to Flighty and its benefits though. Looks like a nice clean app, probably just not what I needed in this specific case.