| Rietberg to Smolyan | 1,040.97 mi (1,675.27 km) |
| Rietberg to Sofia | 936.66 mi (1,507.41 km) |
| Rietberg to Sopot | 988.99 mi (1,591.63 km) |
| Rietberg to Sozopol | 1,108.53 mi (1,784.01 km) |
| Rietberg to Sredets | 1,092.93 mi (1,758.89 km) |
| Rietberg to Stamboliyski | 1,007.11 mi (1,620.78 km) |
| Rietberg to Stara Zagora | 1,031.96 mi (1,660.78 km) |
| Rietberg to Svilengrad | 1,084.52 mi (1,745.37 km) |
| Rietberg to Svishtov | 964.86 mi (1,552.80 km) |
| Rietberg to Targovishte | 1,027.97 mi (1,654.35 km) |
| Rietberg to Teteven | 958.66 mi (1,542.81 km) |
| Rietberg to Troyan | 976.39 mi (1,571.35 km) |
| Rietberg to Tryavna | 1,005.59 mi (1,618.34 km) |
| Rietberg to Tutrakan | 993.56 mi (1,598.98 km) |
| Rietberg to Varna | 1,080.34 mi (1,738.65 km) |
