| Bottrop to Smolyan | 1,083.72 mi (1,744.08 km) |
| Bottrop to Sofia | 979.56 mi (1,576.44 km) |
| Bottrop to Sopot | 1,034.42 mi (1,664.73 km) |
| Bottrop to Sozopol | 1,158.02 mi (1,863.65 km) |
| Bottrop to Sredets | 1,141.56 mi (1,837.16 km) |
| Bottrop to Stamboliyski | 1,050.87 mi (1,691.21 km) |
| Bottrop to Stara Zagora | 1,078.39 mi (1,735.50 km) |
| Bottrop to Svilengrad | 1,130.33 mi (1,819.08 km) |
| Bottrop to Svishtov | 1,013.69 mi (1,631.38 km) |
| Bottrop to Targovishte | 1,077.74 mi (1,734.45 km) |
| Bottrop to Teteven | 1,003.89 mi (1,615.61 km) |
| Bottrop to Troyan | 1,022.34 mi (1,645.30 km) |
| Bottrop to Tryavna | 1,052.81 mi (1,694.34 km) |
| Bottrop to Tutrakan | 1,045.24 mi (1,682.16 km) |
| Bottrop to Varna | 1,131.83 mi (1,821.50 km) |
