Miles between Grand Rapids, MI and Thornton, CO

There are
1,157 mi
from Grand Rapids, MI to Thornton, CO

That's the driving distance. It would take 20 hours 35 mins to go from Grand Rapids, Michigan to Thornton, Colorado.

The flight distance (direct flight from Grand Rapids, MI to Thornton, CO) is 1,020.41 mi.

1,157 mi = 1.61 kms