Miles between St Louis, MO and Round Lake, IL

There are
326 mi
from St Louis, MO to Round Lake, IL

That's the driving distance. It would take 6 hours 13 mins to go from St Louis, Missouri to Round Lake, Illinois.

The flight distance (direct flight from St Louis, MO to Round Lake, IL) is 280.22 mi.

326 mi = 525.10 kms