Most airports do not have electric carts. So ask for wheelchair assistance in your airline reservation. If you are at an airport that uses electric carts then that is most likely what you'll get. If not you can get a wheelchair ride from the curb (if necessary) to the plane and back. If you'll be flying to/from a smaller airport or on smaller aircraft (less that 80 seats) be sure to let your airline(s) know whether or not you can climb stairs.