Miles between San Marcos, CA and Ontario, OR

There are
900 mi
from San Marcos, CA to Ontario, OR

That's the driving distance. It would take 17 hours 6 mins to go from San Marcos, California to Ontario, Oregon.

The flight distance (direct flight from San Marcos, CA to Ontario, OR) is 752.04 mi.

900 mi = 1,448.07 kms