There are
2,445 mi
from San Marcos, CA to Aliquippa, PA
That's the driving distance. It would take 1 day 19 hours to go from San Marcos, California to Aliquippa, Pennsylvania.
The flight distance (direct flight from San Marcos, CA to Aliquippa, PA) is 2,087.49 mi.
2,445 mi = 3.22 kms