Miles between St Peters, MO and Round Lake Beach, IL

There are
348 mi
from St Peters, MO to Round Lake Beach, IL

That's the driving distance. It would take 6 hours 43 mins to go from St Peters, Missouri to Round Lake Beach, Illinois.

The flight distance (direct flight from St Peters, MO to Round Lake Beach, IL) is 281.14 mi.

348 mi = 559.44 kms