There are
505 mi
from Decatur, IL to Vadnais Heights, MN
That's the driving distance. It would take 9 hours 24 mins to go from Decatur, Illinois to Vadnais Heights, Minnesota.
The flight distance (direct flight from Decatur, IL to Vadnais Heights, MN) is 417.04 mi.
505 mi = 813.41 kms