Here's how old a kid has to be to fly alone, plus what it costs for unaccompanied minors to fly Delta, Southwest, American ...
On most airlines, kids between 15 and 17 can choose to travel ... One child may be ready to fly to grandparents' house solo ...
But, you don't actually have to fly in economy with your kids, and it's not really a big deal to place them in economy while you enjoy a lie-flat business class seat with a glass of Prosecco in hand.