Purchase a duffel. Straps and such catch in the conveyor belts and can tear the pack to shreds. Often the TSA will look in backpacks as lots of BP stuff looks like bomb material, if it's in a duffel , at least it catches the spillover. They do not put it back in the way it was. Trust me. Do not fly with fuel of any type, either. If it's a white gas or multi fuel, I dismantle them to prove it contains zero fuel. If you use collapsible trekking poles, have a spare set of shoes or a fishing rod tube, you can throw that in too. Don't forget your size limit is 62" total width x height x depth for most airlines .For example, if your pack is 32 inches high 10" depth and 18" wide = 60" it makes it.
The duffel won't change that figure much, if at all.