I think it would be safer to card flight from 3th part company (Travel agency). instead of directly carding airline.
Also you could call airline company some hours before boarding flight and ask if your flight ticket is ok.
Working on a good fake story should also help for added security. For example make a craiglist post saying you want to sell airline ticket cheaper due to ''you became sick and cant travel'' or other excuses like that. Of course make sure this post is on fake name and cannot be linked back to you. Meaning you need to use socks, seperate email, name etc. You could also use pre paid/burn phone to make fake contact with the ''seller of airline ticket'' and say you sent money by western union for example? then send some WU to a good exchanger to buy LR, if you need LR for something else anyways. Or say you met the seller in person in a public place and paid cash for the ticket. I think this can be pretty safe aslong you dont do it too many times.