Originally posted by Eastbay1K: Denver International's inital code designation was DVX. DEN was shifted from Stapleton to the new airport (as a "coveted item") as they didn't both operate at the same time. "DIA" does not exist as a Denver Airport, code-wise anyway. In fact, DIA isn't used anywhere.
I seem to remember reading that, as the current airport neared completion, the decision to "transfer" the DEN designation was based, in part, on a desire to demonstrate in a symbolic manner that Stapleton would completely cease commercial operations upon the opening of the new facility.
Also, when the Fresno Air Terminal was formally renamed "Fresno Yosemite International", wasn't there a move afoot to change the code to FYI? (Shameful Disclaimer: I was born and raised within 5 miles of FAT/FYI .....)
