How far is Blacksburg VA to Greensboro NC?

140 miles taking this route:

1. Take U.S. 460 EAST from Blacksburg to I-81 NORTH to ROANOKE at EXIT 1A.
2. Take I-81 NORTH to I-581/U.S. 220 SOUTH to ROANOKE at EXIT 143.
3. Follow U.S. 220 SOUTH to Greensboro.