Miles between San Marcos, CA and Johnston, IA

There are
1,715 mi
from San Marcos, CA to Johnston, IA

That's the driving distance. It would take 1 day 5 hours to go from San Marcos, California to Johnston, Iowa.

The flight distance (direct flight from San Marcos, CA to Johnston, IA) is 1,409.95 mi.

1,715 mi = 1.61 kms