| Rheinbach to Popovo | 1,034.42 mi (1,664.74 km) |
| Rheinbach to Provadia | 1,090.24 mi (1,754.57 km) |
| Rheinbach to Radnevo | 1,066.54 mi (1,716.43 km) |
| Rheinbach to Radomir | 939.63 mi (1,512.18 km) |
| Rheinbach to Rakitovo | 1,008.88 mi (1,623.63 km) |
| Rheinbach to Rakovski | 1,029.00 mi (1,656.02 km) |
| Rheinbach to Razgrad | 1,038.67 mi (1,671.57 km) |
| Rheinbach to Razlog | 990.27 mi (1,593.69 km) |
| Rheinbach to Ruse | 1,004.15 mi (1,616.02 km) |
| Rheinbach to Samokov | 972.43 mi (1,564.97 km) |
| Rheinbach to Sandanski | 998.49 mi (1,606.91 km) |
| Rheinbach to Sevlievo | 1,002.72 mi (1,613.72 km) |
| Rheinbach to Shumen | 1,065.71 mi (1,715.10 km) |
| Rheinbach to Silistra | 1,047.02 mi (1,685.02 km) |
| Rheinbach to Sliven | 1,066.04 mi (1,715.63 km) |
