Originally Posted by
RK23
I had to search the fares to see if the poster meant IAD or SEA since they said WAS.
There is no ambiguity when WAS is used as an airport code -- WAS covers DC-area airports just like NYC covers New York City, PAR for Paris, etc. See:
https://wikitravel.org/en/Metropolit..._Airport_Codes
Granted this can cause confusion e.g. post 8, will ping the forum mods to update the title to put the airport codes in caps.