515 miles.
The driving distance is 855 miles.
The driving distance from Roanoke, VA to Bethesda, MD is 240 miles.
Probably about four hours or so. Roanoke is very very southwest and Alexandria, which is practically DC, is very northeast. Virginia is a big wide state.
The flight distance from Roanoke, Virginia to Destin, FL, landing in Valparaiso, FL is 600.4 miles. The driving distance is 747.1 miles. The drive takes 11 hours 50 minutes in normal driving conditions.
Using Google Maps one is able to calculate the distance as well as the driving travel time. The distance between Tampa, Florida and Roanoke (presumably Virginia) is 775 miles. The resulting travel time is 12 hours and 50 minutes.
About 641 miles.
The shortest driving distance is 541 miles.
The driving distance is about 230 miles.
The driving distance is 51 miles.
The driving distance is about 1,440 miles.
The driving distance is about 255 miles.
About 460 miles.