• itsgroundhogdayagain@lemmy.ml
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    4 months ago

    It’s the airport code. City starts with P, ends with D, X is just there if they build more airports in the future.

    • GissaMittJobb@lemmy.ml
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      4 months ago

      Wasn’t the use of an X an artifact of the standardization of airport codes into three letters? With airports already having two letter-codes appending an X to meet the new standard.