I don't know about discounts, but Southwest Airlines was very accommodating to me when I had my surgery and they let me board the plane first. I told them that I just had surgery and that I needed to be against a window so that no one would hit or bump me.
Dr. Hitselberger is really a great guy. I know that you will be happy with him! I wish you the best and please keep us posted.
If you have any questions, please give me a personal email. I'll be praying for your daughter. Ann