There are
2,125 mi
from Wheaton, IL to San Mateo, CA
That's the driving distance. It would take 1 day 12 hours to go from Wheaton, Illinois to San Mateo, California.
The flight distance (direct flight from Wheaton, IL to San Mateo, CA) is 1,830.45 mi.
2,125 mi = 3,420.14 kms