I was on a flight last year (2022) to Miami and witnessed a younger woman doing this to a guy for over 10 minutes straight. Seated directly behind them and managed to record some of it too. Wasn't the only one to notice them and I think they knew they were being watched. Got horny watching them so using my hoodie over my lap as a cover, I played with my clit until I came.
I’ve done this before with an ex-boyfriend. If you’re really wanting to do this challenge, book evening midweek flights which are usually not crowded and get a seat in the back of the plane just forward of the lavatory. Spring Break is the ideal time because nobody will complain and you’ll be so badass doing it.