Miles between San Marcos, CA and Rock Island, IL

There are
1,881 mi
from San Marcos, CA to Rock Island, IL

That's the driving distance. It would take 1 day 8 hours to go from San Marcos, California to Rock Island, Illinois.

The flight distance (direct flight from San Marcos, CA to Rock Island, IL) is 1,563.11 mi.

1,881 mi = 1.61 kms