| Bonn to Smolyan | 1,048.74 mi (1,687.78 km) |
| Bonn to Sofia | 944.90 mi (1,520.67 km) |
| Bonn to Sopot | 1,001.80 mi (1,612.25 km) |
| Bonn to Sozopol | 1,129.02 mi (1,816.98 km) |
| Bonn to Sredets | 1,111.74 mi (1,789.18 km) |
| Bonn to Stamboliyski | 1,016.78 mi (1,636.36 km) |
| Bonn to Stara Zagora | 1,046.60 mi (1,684.33 km) |
| Bonn to Svilengrad | 1,097.87 mi (1,766.85 km) |
| Bonn to Svishtov | 984.32 mi (1,584.11 km) |
| Bonn to Targovishte | 1,049.18 mi (1,688.50 km) |
| Bonn to Teteven | 971.18 mi (1,562.96 km) |
| Bonn to Troyan | 990.22 mi (1,593.61 km) |
| Bonn to Tryavna | 1,021.80 mi (1,644.43 km) |
| Bonn to Tutrakan | 1,018.79 mi (1,639.59 km) |
| Bonn to Varna | 1,104.99 mi (1,778.30 km) |
