There are
2,490 mi
from Great Falls, MT to Auburndale, FL
That's the driving distance. It would take 1 day 21 hours to go from Great Falls, Montana to Auburndale, Florida.
The flight distance (direct flight from Great Falls, MT to Auburndale, FL) is 2,075.61 mi.
2,490 mi = 4,007.53 kms