In section "Maps", select the airport you want to look at, zoom in, and select "aerial photo".
The only downside is, that you will get a small pic only. Now the tric is to download all these small pics in max resolution, or one step more coarse, and copy/paste all these little pics to one giant pic using a photo editor. This is very simple, although somewhat time consuming...to say the least!! I did it with microsoft photo editor, and the results are absolutely amazing. Got some fabulous large photos of MIA, DTW, ATL, DFW, MSP etc.
Don't be affraid of these large URL's, just click em!!
mapquest is amazing, however i often look at Philadelphia international airport and the picture is about 1 or 2 yrs old, now i know for many airports they dont change much over a couple years however PHL has changed tremendously over the past couple years and unfortunately the mapquest picture doesnt show any of these recent changes