Why is nashville airport listed as BNA instead of NA?
According to international regualtions by the IATA (International Air Transport Association) every airport on this world needs to have a unique 3 letter code so it can be identified in international travel. For some airports this is pretty straight forward (e.g. Frankfurt in Germany is FRA), for others it is a bit more complicated (e.g. London has 4 airports, each code starts with the letter L, and the next two are in relation to the name of the airport: London Heathrow is LHR, London Gatwick is LGW, etc), for some the code is just plain strange (e.g. Toronto’s airport is called Lester B. Pearson International, but the code is YYZ?!?!). For Nashville the code could have theoretically been NAS, but NAS is already Nassau on the Bahamas, so they had to come up with something else. Why they decided to stick a B in front we may never know…
