I took the advice of the photographers of Nat Geo and Playboy, to never pack your exposed film in your luggage. Then to use the lead lined bags to protect them from x-rays.

Alas, security (way pre TSA) turned up the power to see through the bag. Streaks and spots galore.

After that it was simple zip locks and request for hand search.

It depends on the purpose to the display of the photos.

A friend, now an award winning photographer, goes to various events to show off his photography, with a focus on his 2 big projects. He makes 18x24, 2x3 & 4x6 prints of his subjects.

He has long strips of aluminum or plastic, that get clamped to the top and bottom of the prints. Those then become the hanging points and weight to hold the print straight.