fueled lighters per person in checked baggage
for domestic travel, only under the terms and conditions of a special permit (e.g., Special Permit Nos. 14327, 14373, 14415), which require a lighter to be placed in an approved package that protects its sparking mechanism from accidentally igniting during transport.
International regulations do not recognize these special permits, so do not pack these lighters for travel abroad. Approved packages under these Special Permits bear a marking identifying them as such.
Lighter fuel, lighter refills, and lighters containing unabsorbed liquid fuel
(other than liquefied gas) are not permitted either on your person or in carry-on or checked baggage