Don’t most airlines have a provision for unaccompanied minors to fly? I’m quite sure they do.
16? Geez…our kids flew alone when they were 10. I think we had to pay a tad more as they were unaccompanied minors…but they did it. This was to visit relatives…and at the time…pre 9/11…they could be taken to the gate here by us…and met at the gate at their destination.