Miles between Billings, MT and Ontario, OR

There are
673 mi
from Billings, MT to Ontario, OR

That's the driving distance. It would take 11 hours 47 mins to go from Billings, Montana to Ontario, Oregon.

The flight distance (direct flight from Billings, MT to Ontario, OR) is 431.29 mi.

673 mi = 1,083.09 kms