Miles between Allentown, PA and Longmont, CO

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

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

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

1,703 mi = 1.61 kms