I had one flight with my mother when I was about 8, primarily to visit her friends (and mine) in MASS after my family moved to NM just before I turned 6.
From 10-15 I generally flew 2-3 times (round trip) a year as my parents divorced when I was 8 and split custody, and my mother moved out of state after the first two years. So Winter and Summer breaks, sometimes Spring break. I can’t recall flying for any other reasons (we were also a driving family for vacations, including driving to Colorado!) until I began to check out universities I was considering applying too, and even then, drove to several of them. Also arguably not a child at that point.