Looks like B and H have what i said, 450D + 18-55
IS + 55-250
IS for $790, That is well below your budget, this will be a good start, in good sun, you will have no problem getting great photos. Then you can look at getting some better glass, I know you will use the two kit lenses on trips, and other situations when you won't want to pull out the L glass.
$1500 will get you either the 100-400 or a 70-200 2.8, these will be with you for a very long time, so save you money and work towards one or both of these lenses. This is the message that I have been reading on here for many years. I have a 10D, 5D, 17-40 f4, 24-105 f4
IS, 70-200 f2.8
IS, 75-300
USM, and a sigma 170-500. So as you can see, once you buy a lens it will stay with you for a long time, so start slow and work towards the best you can afford at the time... as well learn the camera and how it works...
On another note, the 250mm in the kit will give you a good idea if the 70-200 will be enough zoom for your airport or if you need the 100-400. I find the 100-400 to be an amazing lens with lots of different varieties of possible pictures. I took my buddies to
LAS a few years back and it was simply amazing.
Good luck and keep us posted, we look forward to your first photo and more,
Grant