There are
2,650 mi
from San Marcos, CA to Elizabethtown, PA
That's the driving distance. It would take 1 day 23 hours to go from San Marcos, California to Elizabethtown, Pennsylvania.
The flight distance (direct flight from San Marcos, CA to Elizabethtown, PA) is 2,279.63 mi.
2,650 mi = 3.22 kms