Hi cockpitvisit,
Your 'Airline Route Mapper' is da bomb! Let me throw out a small enhancement request that I think would go a long way to making the app even easier to use.
I'm pretty good at geography but when it comes to smaller airports in many parts of the world, it isn't always clear to me what country the airport is in. Obviously adding borders to the map would be nice but may not be trivial depending on where and how your map is stored in the map. However, right now you already include the name of the city where the airport is located in the tool tip. It would be awesome if you could also include the country. So:
BSG
Bata
would become
BSG
Bata, Equatorial Guinea
Once source of geographical locations could be wikipedia:
http://en.wikipedia.org/wiki/List_of...y_IATA_code:_B
Caesar