I usually show up with roughly 10 lighters each trip, and am lucky if I go home with one. On my preferred airline they only have a quantity limit if flying to Japan. I cannot speak for any other airline, but this is what AA advertises. I also just returned from Europe and passed thru security in London and Amsterdam and had no issues either.

https://www.aa.com/i18n/travelInform...restricted.jsp

Bring your lighters, in your carry on. No issues.