There are
1,582 mi
from Irvine, CA to Mandan, ND
That's the driving distance. It would take 1 day 4 hours to go from Irvine, California to Mandan, North Dakota.
The flight distance (direct flight from Irvine, CA to Mandan, ND) is 1,267.19 mi.
1,582 mi = 2,546.33 kms