Wow! Those website are so incredible. I am never seen it before. It was so much easier for me where I can find for which specific routes. Here some of specific routes:
FLL is 132 nonstop destinations cities
MIA is 200 nonstop destinations cities
LHR is almsot 400 nonstop out of Heathrow. It is lot of routes where come from. It was too many airlines are flying into Heathrow. I didn't realize know that.
You can select for which routes will look it up to tell you which airlines are already flies out of FLL, MIA, LHR, GRU and anywhere whole of the world.
Thank you so much for giving me best your new website. I am really likes it lot. Now, I can tell you for which airlines are already direct or codeshare.