Originally Posted by Rabz
Code change would be a nightmare to implement I'd think. You would hardly ever hear any travel agent/tour operator or anyone associated with the industry say the full name of any city or airport, they all go by the codes when they work.
Thats true. Although in some instances they do change codes.
JFK in NYC was known as Idlewild Int'l until a few weeks after Kennedy's assassination in 1963. It was renamed and the code was changed to JFK.
Personally, I think DHK would be better than DHA.
Interestingly enough, I believe Canada is the only country that uses a convention with their codes, all begin with YY-, eg Toronto Pearson is YYZ.