In 2026, the short answer is no, you generally do not need to remove standard corded hair straighteners, flat irons, or curling irons from your carry-on bag for security screening. TSA and international airport authorities typically treat these as standard small appliances that can remain inside your luggage while it passes through the X-ray machine. However, there is a major exception: cordless, battery-operated straighteners. Because these contain lithium-ion batteries, they are subject to stricter scrutiny. If your straightener uses a gas or butane cartridge, it is often prohibited entirely or subject to very specific safety "caps." If you use a traditional plug-in model, you can leave it packed; just ensure the cord is neatly coiled to prevent it from looking like suspicious wiring on the scanner. As always, a security officer has the final discretion and may ask you to remove any item if the X-ray image is obstructed by other electronics.