Unless you normally use very sensitive (faster than ASA 1600), the x-ray's used for scanning carry-on bags will not harm your film, either exposed or unexposed. Only the new equipment used to scan checked baggage is a hazard to film.
If you normally send your film for developing, that's a great idea.
Personally, we've switched to digital...we can check the photo immediately for 'content' and back in the room (on the laptop) for exposure, etc. Then when we get home, we print the ones we like and can email copies to grandparents, etc. Just remember the batteries!