Quote from: Uncle Duke on September 20, 2019, 09:42:31 AM
https://www.nydailynews.com/news/world/ny-nairobi-lawmaker-stop-farting-on-airplanes-20190912-wknbvyysmrc3bgq6onrogiwm64-story.html
It's actually covered in aviation medicine/human factors info for pilots that flatulence increases with flying due to the pressure changes involved (and an airliner will be pressurised to ~8000ft so there will be a pressure change). I think it might even be discouraged to keep it in because it can lead to pain.
First result from google:
https://www.scmp.com/lifestyle/health-beauty/article/2127660/why-flying-makes-you-flatulent-how-reduce-it-and-whether
https://twitter.com/ilove_aviation/status/1174137204949639168