the last times i went to and from europe the film
was all carry on ... and went through scans a handful of times
no problems
the time before we didn't fly direct but went through heathrow
and were scanned what seemed every few feet ...
on the way back i put a lot of my exposed film in my luggage
( whoops ! ) and when i returned none of my film was damaged ..

have a fun and safe trip !

john