Many people are helped by Southwest by making plane travel convenient and economical. It was founded in 1967 and currently travels to over 120 locations.....
https://www.toursntravelpro.com/baggage-policy/southwest-airlines-baggage-policy/

Are you going to put your kid on a Qatar Airways aircraft by themselves? It can be unsettling for parents to entrust their children’s protection....
https://www.toursntravelpro.com/minor-policy/qatar-airways-unaccompanied-minors-policy/