| Sulphur to Popovo | 6,078.42 mi (9,782.28 km) |
| Sulphur to Provadia | 6,131.19 mi (9,867.19 km) |
| Sulphur to Radnevo | 6,114.73 mi (9,840.71 km) |
| Sulphur to Radomir | 5,987.22 mi (9,635.50 km) |
| Sulphur to Rakitovo | 6,056.84 mi (9,747.54 km) |
| Sulphur to Rakovski | 6,077.79 mi (9,781.26 km) |
| Sulphur to Razgrad | 6,080.73 mi (9,785.99 km) |
| Sulphur to Razlog | 6,036.86 mi (9,715.38 km) |
| Sulphur to Ruse | 6,046.38 mi (9,730.72 km) |
| Sulphur to Samokov | 6,020.42 mi (9,688.93 km) |
| Sulphur to Sandanski | 6,043.34 mi (9,725.82 km) |
| Sulphur to Sevlievo | 6,050.44 mi (9,737.24 km) |
| Sulphur to Shumen | 6,107.84 mi (9,829.61 km) |
| Sulphur to Silistra | 6,081.60 mi (9,787.39 km) |
| Sulphur to Sliven | 6,112.62 mi (9,837.31 km) |
