Miles between Boulder, CO and Radcliff, KY

There are
1,143 mi
from Boulder, CO to Radcliff, KY

That's the driving distance. It would take 20 hours 24 mins to go from Boulder, Colorado to Radcliff, Kentucky.

The flight distance (direct flight from Boulder, CO to Radcliff, KY) is 1,047.26 mi.

1,143 mi = 1.61 kms