| Rheinbach to Smolyan | 1,050.98 mi (1,691.38 km) |
| Rheinbach to Sofia | 947.23 mi (1,524.43 km) |
| Rheinbach to Sopot | 1,004.56 mi (1,616.69 km) |
| Rheinbach to Sozopol | 1,132.47 mi (1,822.53 km) |
| Rheinbach to Sredets | 1,115.04 mi (1,794.48 km) |
| Rheinbach to Stamboliyski | 1,019.23 mi (1,640.29 km) |
| Rheinbach to Stara Zagora | 1,049.51 mi (1,689.03 km) |
| Rheinbach to Svilengrad | 1,100.64 mi (1,771.30 km) |
| Rheinbach to Svishtov | 987.73 mi (1,589.60 km) |
| Rheinbach to Targovishte | 1,052.74 mi (1,694.22 km) |
| Rheinbach to Teteven | 973.93 mi (1,567.38 km) |
| Rheinbach to Troyan | 993.08 mi (1,598.21 km) |
| Rheinbach to Tryavna | 1,024.88 mi (1,649.39 km) |
| Rheinbach to Tutrakan | 1,022.74 mi (1,645.94 km) |
| Rheinbach to Varna | 1,108.85 mi (1,784.51 km) |
