Sorry if this is old news and/or in the wrong forum but since it´s about airspace and such I figured it might suit here...
Anyway, using the file below will let you display airspac, airways, airports etc in glorious 3d i GE. Make sure to not open the entire world database since that will most likely choke your computer. Open Temporary places, DAFIF and then navigate to your country of choice. It´s well worth downloading GE just to play around with this. Hope you find some use for it.
http://globalais.net/dafifkml/dafifByCountry.kmz
Just click on the link, GE will then open automatically.