Originally Posted by
flyerCO
Also WAS, and while it's also an airport code, DAL.
Same for 'HOU". And then there's DTT for DTW and DET (who knows, maybe someday commercial service will return to DET). Most people know TYO can be used for HND and NRT, but did you know that YTO is valid for YYZ, YTZ, and YHM?