There are
2,346 mi
from Vallejo, CA to Piqua, OH
That's the driving distance. It would take 1 day 17 hours to go from Vallejo, California to Piqua, Ohio.
The flight distance (direct flight from Vallejo, CA to Piqua, OH) is 2,026.96 mi.
2,346 mi = 3.22 kms