| Koblenz to Smolyan | 1,016.87 mi (1,636.50 km) |
| Koblenz to Sofia | 913.16 mi (1,469.59 km) |
| Koblenz to Sopot | 970.64 mi (1,562.10 km) |
| Koblenz to Sozopol | 1,098.98 mi (1,768.63 km) |
| Koblenz to Sredets | 1,081.43 mi (1,740.39 km) |
| Koblenz to Stamboliyski | 985.18 mi (1,585.50 km) |
| Koblenz to Stara Zagora | 1,015.67 mi (1,634.56 km) |
| Koblenz to Svilengrad | 1,066.72 mi (1,716.72 km) |
| Koblenz to Svishtov | 954.21 mi (1,535.66 km) |
| Koblenz to Targovishte | 1,019.33 mi (1,640.45 km) |
| Koblenz to Teteven | 940.00 mi (1,512.79 km) |
| Koblenz to Troyan | 959.22 mi (1,543.71 km) |
| Koblenz to Tryavna | 991.14 mi (1,595.08 km) |
| Koblenz to Tutrakan | 989.70 mi (1,592.76 km) |
| Koblenz to Varna | 1,075.71 mi (1,731.18 km) |
