| Ashburn to Popovo | 5,018.74 mi (8,076.88 km) |
| Ashburn to Provadia | 5,073.36 mi (8,164.78 km) |
| Ashburn to Radnevo | 5,051.18 mi (8,129.09 km) |
| Ashburn to Radomir | 4,919.29 mi (7,916.83 km) |
| Ashburn to Rakitovo | 4,989.16 mi (8,029.27 km) |
| Ashburn to Rakovski | 5,012.47 mi (8,066.79 km) |
| Ashburn to Razgrad | 5,022.21 mi (8,082.47 km) |
| Ashburn to Razlog | 4,967.91 mi (7,995.08 km) |
| Ashburn to Ruse | 4,987.71 mi (8,026.95 km) |
| Ashburn to Samokov | 4,952.87 mi (7,970.87 km) |
| Ashburn to Sandanski | 4,973.28 mi (8,003.71 km) |
| Ashburn to Sevlievo | 4,987.60 mi (8,026.77 km) |
| Ashburn to Shumen | 5,049.32 mi (8,126.10 km) |
| Ashburn to Silistra | 5,026.61 mi (8,089.54 km) |
| Ashburn to Sliven | 5,051.00 mi (8,128.79 km) |
