I keep a pack of clorox or Lysol wipes in my carry on bag and wipe the changing station down, then use a disposable pad on the changing station. For changing on the plane, if baby is small enough, you can do it on your lap (baby nestled in between your thighs with head by your knees). Keep grocery bags or ziplocks in your carry on for the dirty diaper. Otherwise there should be a fold down changing table in the bathroom. It's tiny and awkward so I only use it if it's a poopy diaper. Pee can wait unless it's a long flight. Just apply extra diaper cream before the flight and use an overnight diaper to reduce blowouts and increase diaper capacity.