I honestly don't understand this fear of hunger hamplanets seem to have. You are a little uncomfortable for a couple hours because you can't stuff your face with greasy shit? Toughen the fuck up. I once ran out of food while backpacking the AT, and continued to hike for five days without eating anything more than a few berries along the way. Yeah, I was hungry for a while, but so what? Humans have tens of thousands of years of evolutionary pressure that gave us the ability to go days without food if we have to. You aren't going to die from not eating on a flight.