| Oer-Erkenschwick to Popovo | 1,050.39 mi (1,690.45 km) |
| Oer-Erkenschwick to Provadia | 1,104.40 mi (1,777.37 km) |
| Oer-Erkenschwick to Radnevo | 1,086.82 mi (1,749.07 km) |
| Oer-Erkenschwick to Radomir | 965.91 mi (1,554.48 km) |
| Oer-Erkenschwick to Rakitovo | 1,034.34 mi (1,664.62 km) |
| Oer-Erkenschwick to Rakovski | 1,051.44 mi (1,692.13 km) |
| Oer-Erkenschwick to Razgrad | 1,053.39 mi (1,695.26 km) |
| Oer-Erkenschwick to Razlog | 1,017.52 mi (1,637.55 km) |
| Oer-Erkenschwick to Ruse | 1,018.92 mi (1,639.79 km) |
| Oer-Erkenschwick to Samokov | 997.97 mi (1,606.08 km) |
| Oer-Erkenschwick to Sandanski | 1,027.18 mi (1,653.08 km) |
| Oer-Erkenschwick to Sevlievo | 1,022.26 mi (1,645.17 km) |
| Oer-Erkenschwick to Shumen | 1,080.51 mi (1,738.91 km) |
| Oer-Erkenschwick to Silistra | 1,058.08 mi (1,702.82 km) |
| Oer-Erkenschwick to Sliven | 1,084.17 mi (1,744.81 km) |
