| Rehlingen-Siersburg to Smolyan | 1,021.60 mi (1,644.10 km) |
| Rehlingen-Siersburg to Sofia | 919.16 mi (1,479.25 km) |
| Rehlingen-Siersburg to Sopot | 980.14 mi (1,577.39 km) |
| Rehlingen-Siersburg to Sozopol | 1,114.21 mi (1,793.14 km) |
| Rehlingen-Siersburg to Sredets | 1,095.32 mi (1,762.75 km) |
| Rehlingen-Siersburg to Stamboliyski | 991.82 mi (1,596.19 km) |
| Rehlingen-Siersburg to Stara Zagora | 1,026.40 mi (1,651.84 km) |
| Rehlingen-Siersburg to Svilengrad | 1,075.95 mi (1,731.58 km) |
| Rehlingen-Siersburg to Svishtov | 969.63 mi (1,560.48 km) |
| Rehlingen-Siersburg to Targovishte | 1,035.75 mi (1,666.88 km) |
| Rehlingen-Siersburg to Teteven | 949.51 mi (1,528.09 km) |
| Rehlingen-Siersburg to Troyan | 969.70 mi (1,560.58 km) |
| Rehlingen-Siersburg to Tryavna | 1,003.43 mi (1,614.87 km) |
| Rehlingen-Siersburg to Tutrakan | 1,009.82 mi (1,625.15 km) |
| Rehlingen-Siersburg to Varna | 1,094.69 mi (1,761.74 km) |
