There are
1,566 mi
from Dayton, OH to Evanston, WY
That's the driving distance. It would take 1 day 3 hours to go from Dayton, Ohio to Evanston, Wyoming.
The flight distance (direct flight from Dayton, OH to Evanston, WY) is 1,404.54 mi.
1,566 mi = 1.61 kms