| Herk-de-Stad to Provadia | 1,170.74 mi (1,884.13 km) |
| Herk-de-Stad to Radnevo | 1,146.25 mi (1,844.71 km) |
| Herk-de-Stad to Radomir | 1,018.02 mi (1,638.34 km) |
| Herk-de-Stad to Rakitovo | 1,087.44 mi (1,750.07 km) |
| Herk-de-Stad to Rakovski | 1,108.30 mi (1,783.63 km) |
| Herk-de-Stad to Razgrad | 1,119.14 mi (1,801.07 km) |
| Herk-de-Stad to Razlog | 1,068.33 mi (1,719.32 km) |
| Herk-de-Stad to Ruse | 1,084.62 mi (1,745.52 km) |
| Herk-de-Stad to Samokov | 1,051.00 mi (1,691.42 km) |
| Herk-de-Stad to Sandanski | 1,076.08 mi (1,731.79 km) |
| Herk-de-Stad to Sevlievo | 1,082.58 mi (1,742.25 km) |
| Herk-de-Stad to Shumen | 1,146.17 mi (1,844.58 km) |
| Herk-de-Stad to Silistra | 1,127.71 mi (1,814.87 km) |
| Herk-de-Stad to Sliven | 1,146.10 mi (1,844.47 km) |
| Herk-de-Stad to Smolyan | 1,129.55 mi (1,817.84 km) |
