Miles between Boulder, CO and New Castle, IN

There are
1,152 mi
from Boulder, CO to New Castle, IN

That's the driving distance. It would take 20 hours 39 mins to go from Boulder, Colorado to New Castle, Indiana.

The flight distance (direct flight from Boulder, CO to New Castle, IN) is 1,051.57 mi.

1,152 mi = 1.61 kms