There are
730 mi
from Duluth, MN to Piqua, OH
That's the driving distance. It would take 14 hours 23 mins to go from Duluth, Minnesota to Piqua, Ohio.
The flight distance (direct flight from Duluth, MN to Piqua, OH) is 604.25 mi.
730 mi = 1,175.51 kms