About ¼ or a fourth of the way, you can stop at Front Royal, VA. This is almost an hour west of Ashburn.
About ⅓ or a third of the way, you can stop at Maurertown, VA. This is about 1 hour west of Ashburn.
About ⅔ or two thirds of the way, you can stop at Davis, VA. This is about 2½ hours southwest of Ashburn, or about 1 hour northeast of Vinton.
About ¾ or three fourths of the way, you can stop at Greenville, VA. This is about 2½ hours southwest of Ashburn, or about 1 hour northeast of Vinton.
If you drive straight through without stopping at all, the total distance is 218 miles. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 3 hours, 31 minutes.