What is lf airline code?

"LF" is not an airline code that is currently in use. Airline codes are typically two or three characters and are assigned by the International Air Transport Association (IATA) to identify airlines in the global airline industry. There are over 200 airline codes in use today, and each code is unique to the airline it represents. If you have any further information about the airline or context in which "LF" was used, please provide it for a more accurate response.