It is 598.76 miles according to MapQuest, but go ahead and call it about 600 miles if it makes you feel good.
593 miles about 10 hours
its 592 miles from Hattiesburg to Orlando, Florida
It is 506 miles according to Google Maps.
It is 558.84 miles according to MapQuest.
45 miles
288 miles.
It is 811.20 miles according to MapQuest.
It is 570.78 miles according to MapQuest.
27 miles across MS-42 WEST.
774 miles
822 mi, 13 hours 32 mins
According to Mapquest: it takes 26 hrs 6 mins / 1710.01 miles depending on the route from Hattiesburg, MS to Las Vegas, Nevada.