There are
1,475 mi
from Billings, MT to Seymour, IN
That's the driving distance. It would take 1 day 1 hour to go from Billings, Montana to Seymour, Indiana.
The flight distance (direct flight from Billings, MT to Seymour, IN) is 1,241.38 mi.
1,475 mi = 1.61 kms