Some great shots there, I think some of them could be further bettered with a few tweaks.
Whenever I take shots through plane windows I find the results need a contrast boost. I do get a bit carried away with the contrast sometimes,
This is an example at 34000ft over India last month with a 5DII and 50mm 1.8:

Cloud Bomb by
ACW#, on Flickr
This shot is stopped right down to f/6.3 and a shutter speed of 1250th. Apart from the occasional dirty window, I don't usually find any need to shoot wide open at f/2.8 f/1.8 and the like.
Then this is an example taken with my humble point and shoot over Arizona:

Somewhere over Arizona by
ACW#, on Flickr
This was f/5.0 on the compact, so plenty of depth of field.
The point and shoot didn't capture as much detail, and there wasn't as much room for image adjustments but as a window snapper I think it held up ok.
Both had a fair dose of slider movement in Lightroom.
What kind of adjustments do have you tried on yours?