| Wetzlar to Smolyan | 990.39 mi (1,593.87 km) |
| Wetzlar to Sofia | 886.35 mi (1,426.44 km) |
| Wetzlar to Sopot | 942.28 mi (1,516.46 km) |
| Wetzlar to Sozopol | 1,068.18 mi (1,719.07 km) |
| Wetzlar to Sredets | 1,051.16 mi (1,691.69 km) |
| Wetzlar to Stamboliyski | 957.96 mi (1,541.69 km) |
| Wetzlar to Stara Zagora | 986.74 mi (1,588.00 km) |
| Wetzlar to Svilengrad | 1,038.30 mi (1,670.98 km) |
| Wetzlar to Svishtov | 923.57 mi (1,486.34 km) |
| Wetzlar to Targovishte | 988.20 mi (1,590.35 km) |
| Wetzlar to Teteven | 911.70 mi (1,467.23 km) |
| Wetzlar to Troyan | 930.48 mi (1,497.47 km) |
| Wetzlar to Tryavna | 961.63 mi (1,547.60 km) |
| Wetzlar to Tutrakan | 957.26 mi (1,540.56 km) |
| Wetzlar to Varna | 1,043.56 mi (1,679.45 km) |
