There are
2,423 mi
from Saginaw, MI to San Mateo, CA
That's the driving distance. It would take 1 day 18 hours to go from Saginaw, Michigan to San Mateo, California.
The flight distance (direct flight from Saginaw, MI to San Mateo, CA) is 2,037.94 mi.
2,423 mi = 3,898.95 kms