| Cologne to Smolyan | 1,061.38 mi (1,708.13 km) |
| Cologne to Sofia | 957.46 mi (1,540.88 km) |
| Cologne to Sopot | 1,013.94 mi (1,631.78 km) |
| Cologne to Sozopol | 1,140.38 mi (1,835.26 km) |
| Cologne to Sredets | 1,123.28 mi (1,807.75 km) |
| Cologne to Stamboliyski | 1,029.24 mi (1,656.40 km) |
| Cologne to Stara Zagora | 1,058.56 mi (1,703.59 km) |
| Cologne to Svilengrad | 1,109.98 mi (1,786.35 km) |
| Cologne to Svishtov | 995.74 mi (1,602.49 km) |
| Cologne to Targovishte | 1,060.43 mi (1,706.60 km) |
| Cologne to Teteven | 983.33 mi (1,582.52 km) |
| Cologne to Troyan | 1,002.25 mi (1,612.96 km) |
| Cologne to Tryavna | 1,033.59 mi (1,663.40 km) |
| Cologne to Tutrakan | 1,029.55 mi (1,656.91 km) |
| Cologne to Varna | 1,115.85 mi (1,795.79 km) |
