Miles between Boulder, CO and Allentown, PA

There are
1,719 mi
from Boulder, CO to Allentown, PA

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

The flight distance (direct flight from Boulder, CO to Allentown, PA) is 1,562.05 mi.

1,719 mi = 1.61 kms