Bad Attitudes. 1991.
I think this is the most obscure movie I own. It was made for TV, and was apparently forgotten almost immediately. In fact, my only evidence of its existence is the very same VHS copy which I used to rent from my local video store every week for a year (I was later able to purchase it from them).
The story is about five kids who are being sent to a crappy summer camp, and have been dropped off at the airport by their respective guardians. None of them want to go to the camp, so they try to escape. One kid, being from a wealthy family, spots a private jet belonging to a friend of his father, and they all stow away on board, hoping the plane's owner won't give them away.
The plane is then hijacked by two inept terrorists who think the kids all belong to the plane owner's family, and decide to take them as hostages. The rich kid admits that he has been taught some basics on how to fly the plane, so the terrorists make him take off, hoping to get to Switzerland.
The kids don't want to go to Switzerland either, so they rebel against the terrorists and eventually manage to tie them up. That's the end of their troubles, until it turns out there's a ticking time bomb on board - and that the 11-year-old pilot was never told how to LAND the plane!
(Dang... Now I want to go watch it again!)