Ummmmmm a whole night. It was when I flew from Korea to the states and we flew overnight. I CaNnOt sleep on airplanes :[
Two days (never going to do it again, vv hard to not shut my eyes without falling to the ground, oops.)
10 hour flight.. edit: like plus 5 hours from previous travels Had to stay awake for another what, 3 hours? When we were at the hotel I couldn't sleep. What..?
Well... i have never been up past 3am with no sleep. Longest i've stayed up was around 2-2:30am when I went clubbing. I have a pretty good sleep habit ;~;