DS is off to the States in August, his friend is going out alone the week before and ds will fly alone & hook up with the friend (same age) and friend's 28 yr old brother and young family. They'll be doing a white water rafting course & various other stuff.
DS will be flying United out of LHR via Denver, changing planes on a two hour stopover and then on for a short (1.5) hour hop to final airport.
He'll be a couple of weeks short of his 16th birthday, is a bright kid but has never flown transatlantic (or anywhere for that matter) alone before.
United are relaxed, they say they're happy for him not to travel as UM, but I'm not sure really.
Any experience/views?