Hmm, I tried that one a little bit, but it didn't seem much different than Orbitz or something with my looking around.

I bumped into Skyscanner, a site I used to book confirmed travel when I was in Europe (the only way I know of to get flights with connections on RyanAir if you have to resort to that, which is nice). They have a huge list of airports, but it's fairly disjointed (like Wikipedia's list, which I had seen before). However, just for kicks, I went to their contact page. When choosing the category, they have an "integration enquiry" section. Description: "Want to add Skyscanner's maps, prices and flight information to your site? Let us know which Skyscanner features you'd like to add and be first to receive details of the new integration solutions." Seems promising, I'm going to see what a message would do...