Miles between St Joseph, MO and Alton, IL

There are
309 mi
from St Joseph, MO to Alton, IL

That's the driving distance. It would take 5 hours 56 mins to go from St Joseph, Missouri to Alton, Illinois.

The flight distance (direct flight from St Joseph, MO to Alton, IL) is 255.74 mi.

309 mi = 497.96 kms