The Bic Lighters can be drained of fuel OR enclosed in a special packaging which you can pick up from any Cigar shop or online for about $10-15.

That said, when it comes to checked bags even if you follow all the protocols they might "disappear"

Your mileage may vary, it seems to vary depending on which TSA agent you get, you could be carrying a 60 pack of them and they might not bat an eyelash or they might confiscate them.

Just don't try to carry them on the airplane as a carry on, I think they feel you'll try to burn the plane.