About 540 miles.
It is 538 miles according to Google Maps.
Unfortunately, no. It's a long, boring trip across the least scenic part of Colorado, and then Nebraska.
It you are driving from Denver, Colorado, to Omaha, Nebraska, it's 537 miles and takes about 7 hours and 35 minutes. There is no location by the name of Ohama found.
12 hours
It is 610.17 miles according to MapQuest.
843 miles
It is 540.52 miles according to MapQuest.
No. Omaha is in Nebraska
Omaha is MUCH closer to Iowa than Colorado - as Omaha sits on the Missouri River, which is the dividing line between Nebraska and Iowa. Colorado is several hundred miles to the west.
It takes approxamitly 11 hours to drive from Omaha Nebraska to Denver Colorado. Allow up to four more hours in poor weather during the winter months.
110 miles
100 miles