Miles between Boulder, CO and Celina, OH

There are
1,221 mi
from Boulder, CO to Celina, OH

That's the driving distance. It would take 22 hours 7 mins to go from Boulder, Colorado to Celina, Ohio.

The flight distance (direct flight from Boulder, CO to Celina, OH) is 1,089.24 mi.

1,221 mi = 1.61 kms