I’d always heard that you can carry Esbit Fuel Tablets on an airplane in checked baggage. It’s one of the main arguments people use to recomend them for international travel.
While that may have been true before the 9/11 and the creation of the TSA, it’s not true anymore. TSA rules prohibit you from carrying Esbit Fuel Tablets onto an airplane (in their jurisdiction) or from checking Esbit Fuel Tablets or any kind of cooking fuel in your luggage.
No – you can’t bring Esbit Fuel Tablets on an airplane.