After Navy Boot Camp, I spent 14 hours in a flight from Ca. to The Phillipines. I was so cold and stiff, it took me a while to loosen up. That was back when I was just 21 years old. If a planecraft was big enough to allow for passengers to actually walk around while in flight, I could consider an 18 hour pilgrimage, but not till then. I want windows too, lots and lots of windows to see the clouds rushing by.
Did you fly military or civilian?