There is rarely enough room to do a quad pivot transfer in an airplane unless you have bulkhead seats (which they are not required to give you unless you cannot bend your knees). This is difficult even in first class. Be sure you are booked into an aisle with lift-up armrests. The airlines or airport staff will lift him into an aisle chair at the door to the plane. The wheelchairs (take both your power and manual chairs) should be gate checked to your next airport (be sure you get them at any connecting airports). Take the power chair control, backpack, cushion and any other removable parts off as part of your carry-on luggage. The staff will take the aisle chair to the correct row on the plane and then lift him into his aisle seat (don't book a middle or window seat). To avoid having him lifted painfully by his arms (training is poor), I recommend putting a gait belt tightly around his chest and another tightly around both thighs (together). You will need to be in charge of directing the lift using these straps. He should sit on his wheelchair cushion. Also keep an eye on his feet while on the aisle chair...it is easy to get them caught or banged. Be sure all safety straps are used. He will be first on, last off, so be sure your connection time is more than one hour to change planes without being too rushed.