There are
2,125 mi
from San Mateo, CA to Lake In The Hills, IL
That's the driving distance. It would take 1 day 12 hours to go from San Mateo, California to Lake In The Hills, Illinois.
The flight distance (direct flight from San Mateo, CA to Lake In The Hills, IL) is 1,818.32 mi.
2,125 mi = 3.22 kms