Miles between Decatur, IL and Royal Oak, MI

There are
428 mi
from Decatur, IL to Royal Oak, MI

That's the driving distance. It would take 8 hours 7 mins to go from Decatur, Illinois to Royal Oak, Michigan.

The flight distance (direct flight from Decatur, IL to Royal Oak, MI) is 353.20 mi.

428 mi = 689.46 kms