There are
1,283 mi
from Billings, MT to Swansea, IL
That's the driving distance. It would take 22 hours 44 mins to go from Billings, Montana to Swansea, Illinois.
The flight distance (direct flight from Billings, MT to Swansea, IL) is 1,068.73 mi.
1,283 mi = 1.61 kms