Can you use hairspray while flying, or can you bring hairspray on a plane? No flammable liquids or gel hairspray are allowed in carry-on or checked luggage. No matter how small the container, hairspray cannot be transported in checked baggage. They are permitted in checked bags, according to the TSA, as long as they are not marked as hazardous material (HAZMAT), but before you fly with this kind of item, verify with your airline. The main restriction that you should be aware of is the liquid requirement, which states that it must be in a container that is less than 3.4 ounces or 100 ml in volume.