There are
2,092 mi
from San Mateo, CA to Swansea, IL
That's the driving distance. It would take 1 day 12 hours to go from San Mateo, California to Swansea, Illinois.
The flight distance (direct flight from San Mateo, CA to Swansea, IL) is 1,751.66 mi.
2,092 mi = 3.22 kms