You've got quite a range of binos there...covering everything from small pocketable ones, to better light gathering binos to whopping great zoom ones.
I think what you need to ask yourself is what do you want to do with them?
If you are using them at an airport what's your plan with them?
Are you looking at individual plane numbers?
Are you wanting to watch them on approach or on the runway?
Would you want to tripod mount them for a steady view without shake?
Is portability important?
Is water resistance important?
I don't know if you know so I'll outline bino basics:
If you were looking at 10x25 for example, it's 10x magnification by a 25mm lens.
The larger the lens the more light it can gather, that gives a brighter, better image in low light which can be clearer and can be sharper (depending on the optics).
The bigger the glass (make sure you get glass not plastic lenses!) the bigger the binos are and the harder they are to hold for long periods as they are heavier.
If you are wanting to be able to make out the pilots of each plane then maybe the zoom binos would be better for you if you willing to sacrifice detail but the further you are zooming the harder they are to hold steady without shaking.
Have a look at
Minox they should have good lenses on them.