I always struggle with this idea that it's ADHD, but maybe there's more than just the ADHD going on.
I have severe ADHD, combined type (inattentive + 'hyperactive'), but running around the airport or mall away from parents was never an issue. The worst I did was climb into clothing racks at Stein Mart because I was bored out of my skull when my mom shopped there.
The main thing I think is I also got taught to let her or my dad know if I wanted to go look at a thing, so they knew where I was if they couldn't come with, and to let them know again if I wanted to look at another thing.
I don't know if there's something specific I was taught or guided on that caused neither me nor my sister to need that kind of supervision, or if there's a different neurological condition that leads to the bolting, but it ain't ADHD on its own, even severe.