Miles between Gresham, OR and Ontario, OR

There are
364 mi
from Gresham, OR to Ontario, OR

That's the driving distance. It would take 6 hours 42 mins to go from Gresham, Oregon to Ontario, Oregon.

The flight distance (direct flight from Gresham, OR to Ontario, OR) is 286.80 mi.

364 mi = 586.22 kms