Originally Posted by
cepheid
Sometimes airports "move" (as in, a new airport is used with the same designation), or the reference point at the airport used to calculate the mileage may have moved. One particular example is DEN; the mileage (in one or both databases; I don't remember) changed when the current DEN airport opened, replacing the old one whose name I forget.
That would be the old Stapleton airport. But that was almost 15 years ago - hard to believe they haven't updated it since then.
What's even stranger is that sometimes the mileage will differ depending on the UX operator. For example, DEN-COS is 72 miles according to UA.
If you take a Skywest flight they give you 72 but if you take a Mesa flight they only give you 67.