There are
1,746 mi
from Boise, ID to Menomonee Falls, WI
That's the driving distance. It would take 1 day 5 hours to go from Boise, Idaho to Menomonee Falls, Wisconsin.
The flight distance (direct flight from Boise, ID to Menomonee Falls, WI) is 1,405.33 mi.
1,746 mi = 1.61 kms