Miles between Ontario, CA and Casper, WY

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

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

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

1,040 mi = 1.61 kms