Miles between Casper, WY and Ontario, CA

There are
1,040 mi
from Casper, WY to Ontario, CA

That's the driving distance. It would take 18 hours 16 mins to go from Casper, Wyoming to Ontario, California.

The flight distance (direct flight from Casper, WY to Ontario, CA) is 862.31 mi.

1,040 mi = 1,673.65 kms