| Sulphur Springs to Popovo | 6,004.38 mi (9,663.12 km) |
| Sulphur Springs to Provadia | 6,055.23 mi (9,744.96 km) |
| Sulphur Springs to Radnevo | 6,044.39 mi (9,727.50 km) |
| Sulphur Springs to Radomir | 5,922.05 mi (9,530.62 km) |
| Sulphur Springs to Rakitovo | 5,991.16 mi (9,641.84 km) |
| Sulphur Springs to Rakovski | 6,009.42 mi (9,671.23 km) |
| Sulphur Springs to Razgrad | 6,005.59 mi (9,665.07 km) |
| Sulphur Springs to Razlog | 5,972.71 mi (9,612.15 km) |
| Sulphur Springs to Ruse | 5,971.50 mi (9,610.21 km) |
| Sulphur Springs to Samokov | 5,954.71 mi (9,583.18 km) |
| Sulphur Springs to Sandanski | 5,980.53 mi (9,624.73 km) |
| Sulphur Springs to Sevlievo | 5,979.57 mi (9,623.19 km) |
| Sulphur Springs to Shumen | 6,032.60 mi (9,708.53 km) |
| Sulphur Springs to Silistra | 6,003.29 mi (9,661.37 km) |
| Sulphur Springs to Sliven | 6,040.34 mi (9,720.98 km) |
