There are
2,384 mi
from Hayward, CA to Piqua, OH
That's the driving distance. It would take 1 day 17 hours to go from Hayward, California to Piqua, Ohio.
The flight distance (direct flight from Hayward, CA to Piqua, OH) is 2,026.26 mi.
2,384 mi = 3.22 kms