Miles between St Louis, MO and Lemont, IL

There are
276 mi
from St Louis, MO to Lemont, IL

That's the driving distance. It would take 5 hours 7 mins to go from St Louis, Missouri to Lemont, Illinois.

The flight distance (direct flight from St Louis, MO to Lemont, IL) is 240.35 mi.

276 mi = 443.90 kms