Miles between San Mateo, CA and Helena, MT

There are
1,117 mi
from San Mateo, CA to Helena, MT

That's the driving distance. It would take 19 hours 23 mins to go from San Mateo, California to Helena, Montana.

The flight distance (direct flight from San Mateo, CA to Helena, MT) is 816.17 mi.

1,117 mi = 1.61 kms