There are
721 mi
from Gulfport, MS to Seymour, IN
That's the driving distance. It would take 13 hours 18 mins to go from Gulfport, Mississippi to Seymour, Indiana.
The flight distance (direct flight from Gulfport, MS to Seymour, IN) is 620.78 mi.
721 mi = 1,160.00 kms