There are
2,119 mi
from San Mateo, CA to Oswego, IL
That's the driving distance. It would take 1 day 12 hours to go from San Mateo, California to Oswego, Illinois.
The flight distance (direct flight from San Mateo, CA to Oswego, IL) is 1,818.35 mi.
2,119 mi = 3.22 kms