Here's why:
* Flammable: Lighters are designed to ignite flammable materials, making them a safety risk on airplanes.
* TSA regulations: The Transportation Security Administration (TSA) specifically prohibits lighters in carry-on bags.
* Exceptions: Some lighters, like butane lighters designed for stoves, are allowed in checked luggage (not carry-on) if they are empty.
Important note: Even if a lighter is allowed in checked baggage, it's essential to check with your airline for their specific policies and regulations regarding flammable items.