There are
2,353 mi
from Gresham, OR to Piqua, OH
That's the driving distance. It would take 1 day 17 hours to go from Gresham, Oregon to Piqua, Ohio.
The flight distance (direct flight from Gresham, OR to Piqua, OH) is 1,951.21 mi.
2,353 mi = 3.22 kms