Will it fly?
Can you bring Hair Straightener, flat iron (cordless) on a plane?
Coop checked the book. Here's the ruling for Hair Straightener, flat iron (cordless):
CARRY-ON
Yes (Special Instructions)
CHECKED BAG
No
What the TSA says
Cordless hair straighteners that contain lithium metal or lithium ion batteries or are gas or butane fueled are only allowed in carry-on bags. A safety cover must be securely fitted over the heating element. The device must be protected from accidental activation. For more information to portable electronic devices, see the FAA regulations. Gas refills (spare cartridges) are not permitted.
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Based on official TSA guidance. The final decision rests with the TSA officer at the checkpoint.