Originally Posted by
mikensf74
WAS as an all inclusive code for all Washington DC area airports.
Works for other cities, such as CHI - Chicago, all airports and NYC - New York, all airports
One little gotcha is that in the world of pricing fares are filed based on city codes instead of airport codes. I believe that from a pricing perspective city code NYC does not include EWR. I believe that similarly, fares filed to/from WAS do not include BWI.