Miles between San Mateo, CA and Union City, CA

There are
20 mi
from San Mateo, CA to Union City, CA

That's the driving distance. It would take 26 minutes to go from San Mateo, California to Union City, California.

The flight distance (direct flight from San Mateo, CA to Union City, CA) is 15.46 mi.

20 mi = 32.41 kms