Miles between Boulder, CO and Bethlehem, PA

There are
1,727 mi
from Boulder, CO to Bethlehem, PA

That's the driving distance. It would take 1 day 7 hours to go from Boulder, Colorado to Bethlehem, Pennsylvania.

The flight distance (direct flight from Boulder, CO to Bethlehem, PA) is 1,568.09 mi.

1,727 mi = 1.61 kms