Miles between Longmont, CO and Allentown, PA

There are
1,703 mi
from Longmont, CO to Allentown, PA

That's the driving distance. It would take 1 day 6 hours to go from Longmont, Colorado to Allentown, Pennsylvania.

The flight distance (direct flight from Longmont, CO to Allentown, PA) is 1,551.27 mi.

1,703 mi = 1.61 kms