Undeveloped camera film is not prohibited, but you should only transport it in your carry-on baggage; the equipment used to screen checked baggage may damage undeveloped film.
If you are transporting high speed (800 ISO and higher) or specialty film, you may request to have it physically inspected when presented at the screening checkpoint instead of undergoing x-ray screening. You may also request that all of your undeveloped film be physically inspected instead of undergoing x-ray, particularly if your film has or may be screened by x-ray more than five times. To facilitate physical inspection, remove your undeveloped film from the canister and pack it in a clear plastic bag. We recommend leaving your film in the unopened manufacturer’s packaging.
Even if an item is generally permitted, it may be subject to additional screening or not allowed through the checkpoint if it triggers an alarm during the screening process, appears to have been tampered with, or poses other security concerns. The final decision rests with TSA on whether to allow any items on the plane.