| Duisburg to Popovo | 1,063.43 mi (1,711.42 km) |
| Duisburg to Provadia | 1,118.02 mi (1,799.28 km) |
| Duisburg to Radnevo | 1,098.49 mi (1,767.85 km) |
| Duisburg to Radomir | 975.49 mi (1,569.89 km) |
| Duisburg to Rakitovo | 1,044.24 mi (1,680.54 km) |
| Duisburg to Rakovski | 1,062.38 mi (1,709.74 km) |
| Duisburg to Razgrad | 1,066.81 mi (1,716.86 km) |
| Duisburg to Razlog | 1,026.79 mi (1,652.45 km) |
| Duisburg to Ruse | 1,032.31 mi (1,661.34 km) |
| Duisburg to Samokov | 1,007.82 mi (1,621.93 km) |
| Duisburg to Sandanski | 1,035.93 mi (1,667.17 km) |
| Duisburg to Sevlievo | 1,034.14 mi (1,664.29 km) |
| Duisburg to Shumen | 1,093.92 mi (1,760.49 km) |
| Duisburg to Silistra | 1,072.61 mi (1,726.20 km) |
| Duisburg to Sliven | 1,096.54 mi (1,764.71 km) |
