Thanks for all the informative replies. It seems both Kodak & Fujifilm warn that any unprocessed film over ISO 100 should not be scanned.
This is absolutely incorrect. Directly from Kodak's publication: "X-ray equipment used to inspect carry-on baggage uses a very low level of x-radiation that will not cause noticeable damage to most films."
Kodak says that film should not be scanned by machines scanning CHECKED bags. That is a HUGE difference.
It is absolutely safe to carry film onto planes and let it be scanned. I have had films as high as ISO1000 scanned TEN times with no noticeable effect. At all.
To the OP: My kids travel with their INSTAX cameras all the time and this film is unaffected by carry on X Ray scanners. Travel with this film and be at ease.