I just happened to come by old airports (closed and/or abandoned). I read about the Stapleton International Airport, an airport that onced Served Denver as the main airport into Colorado before Denver built the airport we know today as the Denver International Airport
Stapleton International has many issues:
-Runways too close
-Aircaft had to wait for a gate to open
-Limited Gate Space (No larger than a DC-10).
On February 27, 1995, CO34 (Continental Flight 34) to London Gatwick was the last flight out of Stapleton.
The next day, February 28, 1995, Denver International Airport officially opened to air traffic.
UAL1475 from Colorado Springs was the first arrival into DIA and UAL1062 to Kansas City was the airport’s first Departure.
DIA has come a long way then. Here are some news videos I found on YouTube
First Passenger Flights into and out of DEN
Last hour’s at Stapleton Airport before closing