There are
2,148 mi
from San Mateo, CA to Barrington, IL
That's the driving distance. It would take 1 day 13 hours to go from San Mateo, California to Barrington, Illinois.
The flight distance (direct flight from San Mateo, CA to Barrington, IL) is 1,828.31 mi.
2,148 mi = 3.22 kms