Are you not able to use it on the plane itself? It's been a long time since I've flown anywhere, but I seem to recall there being quite good accommodations for such things.
sadly no. ostensibly for safety reasons actually, I think, but likely more because airlines would have to sacrifice seats for wheelchair space. instead, you either have to limp (if you're able) or transfer to a transport chair so they can wheel you to your seat. it's a hassle.
it'd be a tight squeeze through the aisle if it were possible, but I could make it work in my chair.