There are
1,550 mi
from San Marcos, CA to Texarkana, AR
That's the driving distance. It would take 1 day 2 hours to go from San Marcos, California to Texarkana, Arkansas.
The flight distance (direct flight from San Marcos, CA to Texarkana, AR) is 1,333.14 mi.
1,550 mi = 2,494.81 kms