Answer: Turkish Airlines. 121 countries
Just a few years ago I did not give a thought to Turkish Airlines then they exploded on the scene. I remember the aggressive marketing campaign especially the campaign associated with “Batman v. Superman: Dawn of Justice”.
I have been flying Turkish in and out of Europe (mostly Frankfurt) these past years. Hard to beat their prices (HALF of the non-stop from LAX-FRA) and their business class is excellent!!!