| Mettmann to Smolyan | 1,072.06 mi (1,725.31 km) |
| Mettmann to Sofia | 967.99 mi (1,557.83 km) |
| Mettmann to Sopot | 1,023.58 mi (1,647.29 km) |
| Mettmann to Sozopol | 1,148.46 mi (1,848.27 km) |
| Mettmann to Sredets | 1,131.72 mi (1,821.32 km) |
| Mettmann to Stamboliyski | 1,039.52 mi (1,672.94 km) |
| Mettmann to Stara Zagora | 1,067.84 mi (1,718.53 km) |
| Mettmann to Svilengrad | 1,119.56 mi (1,801.76 km) |
| Mettmann to Svishtov | 1,003.97 mi (1,615.74 km) |
| Mettmann to Targovishte | 1,068.32 mi (1,719.30 km) |
| Mettmann to Teteven | 993.01 mi (1,598.10 km) |
| Mettmann to Troyan | 1,011.67 mi (1,628.12 km) |
| Mettmann to Tryavna | 1,042.53 mi (1,677.80 km) |
| Mettmann to Tutrakan | 1,036.55 mi (1,668.16 km) |
| Mettmann to Varna | 1,123.02 mi (1,807.32 km) |
