There are
2,135 mi
from Schaumburg, IL to Foster City, CA
That's the driving distance. It would take 1 day 13 hours to go from Schaumburg, Illinois to Foster City, California.
The flight distance (direct flight from Schaumburg, IL to Foster City, CA) is 1,828.55 mi.
2,135 mi = 3,436.58 kms