There are
1,548 mi
from Vallejo, CA to Mandan, ND
That's the driving distance. It would take 1 day 3 hours to go from Vallejo, California to Mandan, North Dakota.
The flight distance (direct flight from Vallejo, CA to Mandan, ND) is 1,238.91 mi.
1,548 mi = 1.61 kms