Under 2026 TSA guidelines, most standard hair tools like corded blow dryers, flat irons, and curling irons are permitted in both carry-on and checked luggage. Because they plug directly into a wall outlet, they are considered low-risk. However, the rules for cordless tools are much stricter: devices powered by lithium-ion batteries must be packed in your carry-on bag to prevent fire hazards in the cargo hold. Furthermore, gas-powered (butane) curling irons are subject to very specific limitations; they are typically allowed in carry-on bags only if they have a secure safety cover over the heating element, and spare gas cartridges are strictly prohibited. It is always wise to ensure your tools have completely cooled down before packing them to avoid damaging your luggage or triggering a security inspection. For international travel, remember that even if the tool is "allowed," you will likely need a voltage converter or plug adapter, as many U.S. hair tools are not dual-voltage and can be permanently damaged by higher European or Asian electrical currents.