I always packed a stack of disposable changing pads just for this purpose. (twiniversity.com)
There are disposable changing pads on the market, and typically they sell in sets of 10 or more. (babygaga.com)
My tricks run the gamut from what you can do before your trip to make traveling with diapers easier (think order them online and have them shipped to your destination) to how you can make in - flight diaper changes a little more pleasant (think aisle seats, free disposable changing pads and a plastic baggie filled with diaper changing essentials) to what to do immediately when you get to your destination (think set up a changing station asap). (hintmama.com)