There are
2,409 mi
from San Marcos, CA to Cornelius, NC
That's the driving distance. It would take 1 day 18 hours to go from San Marcos, California to Cornelius, North Carolina.
The flight distance (direct flight from San Marcos, CA to Cornelius, NC) is 2,066.59 mi.
2,409 mi = 3.22 kms