Glasgow Intl Airport is GLA and Changsha Huanghua Intl Airport is CSX. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Edinburgh Turnhouse Airport (EDI), Glasgow Prestwick Airport (PIK), Dundee Airport (DND), Isle of Islay Glenegedale Airport (ILY), Campbeltown Machrihanish Airport (CAL).