I can only reply that the photos you post always appear very sharp.
My A380 photos above, were shot as follows -
Nikon D200 DSLR
Nikon 70-200 F2.8 VR + Nikon 2X Teleconverter (shot at 400mm - max zoom for set up. Equivalent to 600mm FX)
F5.6 (max apeture for set up) 1/500 second.
Added stability from either my monopod or tripod - I can't remeber which (sadly, the EXIF data doesn't record this).
Photos were taken in 'RAW' mode and processed using Nikon's free View NX software (I expect that Canon supply similar).
Changes were made (by eye), to 'Exposure', 'Sharpness', 'Highlight Protection' (none of which can be changed in JPEG files) and 'Contrast'. These were then saved in JPEG format.
Finally, Photoshop was used to remove a few 'blotches' present.
I hope this is of help and look forward to seeing your future airways shots.
Really like these airways photos seem so evocative I imagine the passengers quaffing champagne and caviar while watching a movie as they cruise to their destination watchiing the world pass by but of course the reality is they (we ) are crammed in with a meal deal looking at their mobile phones as they wait the opportunity to purchase a scratch card.