Here's another classic. Subway Surfers is an endless runner similar to TempleRun, and I'm sure you've seen it before. Or, play it already. You'll dash and run as fast as you can while dodging oncoming subway trains. Whether they are coming at you, or stopped on the tracks, you'll have to avoid them. Or jump over a train and earn some power-ups along the way. This is another old game, but a classic that works great offline.
It's a simple game but fun for hours on end, and easier enough that kids of all ages can enjoy it. Subway Surfers is perfect to keep kids calm and entertained on a flight. They even have a new Hover-board for true surfing while dodging trains. If you haven't played it yet, we highly recommend this one.