for me living ~30 hours flight from my nearest family, getting short snapchats of whatever things they're up-to, however trivial, makes them seem so much closer. And given that they're less likely to be 'staged' instagram/fb photos, it seems more real to me.
GP is probably including the time it takes to get to the airport, get through the baggage drop, security and boarding procedures, as well as get from the airport to their destination. It can easily add up if both they and their family live in places far from their respective airports, and we're talking intercontinental flight.