| Herdecke to Popovo | 1,036.14 mi (1,667.51 km) |
| Herdecke to Provadia | 1,090.48 mi (1,754.96 km) |
| Herdecke to Radnevo | 1,071.87 mi (1,725.00 km) |
| Herdecke to Radomir | 950.02 mi (1,528.90 km) |
| Herdecke to Rakitovo | 1,018.59 mi (1,639.26 km) |
| Herdecke to Rakovski | 1,036.14 mi (1,667.50 km) |
| Herdecke to Razgrad | 1,039.35 mi (1,672.67 km) |
| Herdecke to Razlog | 1,001.51 mi (1,611.77 km) |
| Herdecke to Ruse | 1,004.86 mi (1,617.17 km) |
| Herdecke to Samokov | 982.19 mi (1,580.68 km) |
| Herdecke to Sandanski | 1,010.97 mi (1,626.99 km) |
| Herdecke to Sevlievo | 1,007.41 mi (1,621.26 km) |
| Herdecke to Shumen | 1,066.47 mi (1,716.31 km) |
| Herdecke to Silistra | 1,044.70 mi (1,681.28 km) |
| Herdecke to Sliven | 1,069.57 mi (1,721.31 km) |
