I'm sorry I missed this when it was first posted, probably because I was on a work trip with my CGM. I've been wearing them for about two years now and fly 10-15 times a year. I've never had a problem with either the one I'm wearing or extras in my carryon. They have never set off the WTMD, I haven't had to go through the body scanners since I started wearing. I began with the Freestyle Libre 2, then 3 and now 3+. I have a co-worker that uses the Dexcom G7 and she has not reported any issues.