There are
2,731 mi
from San Marcos, CA to Chesapeake, VA
That's the driving distance. It would take 2 days to go from San Marcos, California to Chesapeake, Virginia.
The flight distance (direct flight from San Marcos, CA to Chesapeake, VA) is 2,310.89 mi.
2,731 mi = 4,394.61 kms