There are
2,193 mi
from San Mateo, CA to Herrin, IL
That's the driving distance. It would take 1 day 14 hours to go from San Mateo, California to Herrin, Illinois.
The flight distance (direct flight from San Mateo, CA to Herrin, IL) is 1,811.09 mi.
2,193 mi = 3.22 kms