Miles between Billings, MT and Mt Prospect, IL

There are
1,206 mi
from Billings, MT to Mt Prospect, IL

That's the driving distance. It would take 21 hours 4 mins to go from Billings, Montana to Mt Prospect, Illinois.

The flight distance (direct flight from Billings, MT to Mt Prospect, IL) is 1,051.84 mi.

1,206 mi = 1.61 kms