I stumbled upon this while researching the markets that my airport serves in the real world.
It is great help!
Here it is: http://www.theairdb.com/index.html
RK
Very neat site
It be best if they could scrape aircraft size/type, then we would have a pretty good demand indicator
I like the route planning of AWS, but I use http://www.gpsvisualizer.com/calculators for other games. Range rings, airports,you can draw lines, and the output is in Google Earth (select google earth output for kml or kmz, as google maps just does html visual maps) Multiple airports routes, ranges in on go, just use a comma to separate Example range ring 500km,800km LHR, or LHR-CDG,CDG-MAD and etc... And since google earth shows the rings and lines as a layer, it can be filtered with boxes inside google earth.