Miles between Longmont, CO and St Helens, OR

There are
1,247 mi
from Longmont, CO to St Helens, OR

That's the driving distance. It would take 21 hours 42 mins to go from Longmont, Colorado to St Helens, Oregon.

The flight distance (direct flight from Longmont, CO to St Helens, OR) is 974.83 mi.

1,247 mi = 1.61 kms