There are
355 mi
from St Clair Shores, MI to Dekalb, IL
That's the driving distance. It would take 6 hours 45 mins to go from St Clair Shores, Michigan to Dekalb, Illinois.
The flight distance (direct flight from St Clair Shores, MI to Dekalb, IL) is 302.31 mi.
355 mi = 571.83 kms