| South Riding to Popovo | 5,025.78 mi (8,088.21 km) |
| South Riding to Provadia | 5,080.43 mi (8,176.17 km) |
| South Riding to Radnevo | 5,058.14 mi (8,140.29 km) |
| South Riding to Radomir | 4,926.16 mi (7,927.88 km) |
| South Riding to Rakitovo | 4,996.03 mi (8,040.33 km) |
| South Riding to Rakovski | 5,019.39 mi (8,077.94 km) |
| South Riding to Razgrad | 5,029.27 mi (8,093.83 km) |
| South Riding to Razlog | 4,974.75 mi (8,006.09 km) |
| South Riding to Ruse | 4,994.77 mi (8,038.31 km) |
| South Riding to Samokov | 4,959.74 mi (7,981.93 km) |
| South Riding to Sandanski | 4,980.09 mi (8,014.67 km) |
| South Riding to Sevlievo | 4,994.58 mi (8,038.00 km) |
| South Riding to Shumen | 5,056.38 mi (8,137.46 km) |
| South Riding to Silistra | 5,033.73 mi (8,101.00 km) |
| South Riding to Sliven | 5,058.00 mi (8,140.06 km) |
