There are
1,908 mi
from San Marcos, CA to Tupelo, MS
That's the driving distance. It would take 1 day 9 hours to go from San Marcos, California to Tupelo, Mississippi.
The flight distance (direct flight from San Marcos, CA to Tupelo, MS) is 1,632.58 mi.
1,908 mi = 3,070.31 kms