There are
1,551 mi
from San Marcos, CA to Springdale, AR
That's the driving distance. It would take 1 day 3 hours to go from San Marcos, California to Springdale, Arkansas.
The flight distance (direct flight from San Marcos, CA to Springdale, AR) is 1,322.73 mi.
1,551 mi = 2,496.36 kms