Okay, I lied a little. There’s one tiny exception: cordless straighteners with lithium-ion batteries. If yours runs on a rechargeable battery, you can only take it in your carry-on, not checked luggage. But most straighteners plug into the wall, so you’re probably fine.
It’s like the difference between a corded vacuum and a Roomba. One is simple, the other has a brain (and a battery). So, check your model if you’re unsure. Otherwise, pack it, breeze through security, and get ready to look fabulous at your destination.
Bottom line: yes, you can take a hair straightener on an airplane. It’s not a secret, it’s not a hassle, and it’s honestly one of the least interesting things in your bag. But that’s exactly why it’s cool—no drama, just straight hair. Now go forth and pack like a pro.