I-70 EAST all the way...
I-25
According to Google Maps, it's about 640 to 660 miles from Colorado Springs to Harlan, Iowa, depending on which route you take.
I-95 to I-10 to I-25
Via I-470 and I-25 at 132.5 miles.
Depends on the route you take and on traffic. But I would assume at least no longer than an hour maximum
It is 842.20 miles according to MapQuest by the fastest route.
Easily. You can drive through numerous states between those two locations although it may not be via the fastest or the shortest route. In this trip, the fastest route does not enter Colorado.
The route with the shortest driving time is about 360 miles.
It is 1,073 miles via the fastest route according to Google Maps.
The shortest route is on I-90 W.
From the main post office in Albuquerque to the main post office in Colorado Springs is 378 miles.