Yes, hair straighteners are generally allowed in hand luggage on planes. Airlines typically permit carrying one hair straightener in hand luggage, provided it is protected properly, for example by covering the heating plates. It is not usually necessary to take it out separately for security screening, but it may be subject to additional searches. In summary:
- Hair straighteners can be packed in carry-on luggage.
- Ensure the heating element is protected.
- No special restrictions usually apply beyond standard carry-on rules.
- You may need to place it in a tray at security if requested, like other electronics.
This applies widely for flights including in the UK and Europe, but it's always good to check the specific airline's rules for peace of mind.