There are
2,306 mi
from San Marcos, CA to Dearborn, MI
That's the driving distance. It would take 1 day 16 hours to go from San Marcos, California to Dearborn, Michigan.
The flight distance (direct flight from San Marcos, CA to Dearborn, MI) is 1,947.47 mi.
2,306 mi = 3.22 kms