For more than 50 years, airports around the world have been designated by three-letter codes, that usually—but not always—refer to their cities like ATL, DEN, and LAX.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. CHICAGO — Chicago’s O’Hare International ...

At first glance, a three-letter airport code might seem like bureaucratic trivia meant mostly for air-traffic control purposes. But when the code is GAY, FUK or SUX, those letters can stir political ...