A dilemma on my part really ensues in this issue.. Am flying with my family for vacation next month, which includes my mom, dad, brother, and sister. We're flying Y from SE Asia to Europe which is a very long flight. My back and hip couldn't take a flight that long in Y, and I feel very uncomfortable in general flying for that amount of more than 13 hours 1 way due to the problem. I am faced with the question that puts me in a position where I'll be upgrading myself to C while the rest of my family is still back there.. Upgrading everyone is out of the question. What should I do? I feel wrong for doing this, but I also need to take care of my health in essence. Any comments and/or suggestions is most welcome.