http://www.tsa.gov/travelers/airtrav...able_0099.shtm
You may take up to 2 fueled Zippo lighters in your checked baggage if they are properly enclosed in a DOT approved case. You can bring unlimited quantities of unfueled lighters in your checked baggage. If you are uncertain as to whether your lighter is prohibited, please refrain from bringing it to the airport.
I don't know what DOT approved case is.. just read on.
http://www.tsa.gov/travelers/airtrav...ted-items.shtm
Lighters - All lighters are prohibited as carry-on items. Lighters without fuel are permitted in checked baggage. Lighters with fuel are prohibited in checked baggage, unless they adhere to DOT exemptions, which allow up to two fueled lighters if properly enclosed in a DOT approved case. If you are uncertain as to whether your lighter is prohibited, please refrain from bringing it to the airport.
You might be able to carry them without the fuel and fuel them at the destination.
(Disregard this if your destination is not US. )