I am flying from TVC to Chicago on UAL for the October Frequent Flyer University so I won't have to keep asking novice questions. I currently am wearing a boot as I have three broken bones and two torn ligaments in my foot/ankle. I checked my outgoing flight and I am in the last row with my boot foot against the window (right foot, right row of plane). That will be very awkward to get into. There is an economy plus seat available and I am hoping that I will get upgraded to that. However, on the return I do not have a seat assigned and the Economy Plus is sold out. What do you think will happen? What should I be prepared for? What should I reasonably ask for if it comes to no available seat? I believe that there might be a later flight but that would mean my driver wouldn't be able to pick me up since he can't drive at night - or is that my problem?