Miles between Bethlehem, PA and Boulder, CO

There are
1,728 mi
from Bethlehem, PA to Boulder, CO

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

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

1,728 mi = 1.61 kms