There are
2,304 mi
from San Marcos, CA to Dearborn Heights, MI
That's the driving distance. It would take 1 day 16 hours to go from San Marcos, California to Dearborn Heights, Michigan.
The flight distance (direct flight from San Marcos, CA to Dearborn Heights, MI) is 1,942.70 mi.
2,304 mi = 3.22 kms