Are the luggage compartments of planes pressurized?
The under-floor storage area on all the large passenger jets is pressurized, but it may not be climate controlled – so it could get really cold. You should know that even pressurized planes do not keep sea-level pressure, so anything in the cargo compartment or passenger compartment will see a pressure change. A weak packet, tube or bottle carried in the plane could potentially burst or leak at altitude when the ambient pressure is lower. This is a little like packing something at sea level then driving up a mountain. Smaller planes that don’t fly as high as the big jets may not be pressurized at all or may store luggage behind a pressure bulkhead in an unpressurized hold.
