| Saarlouis to Smolyan | 1,017.17 mi (1,636.98 km) |
| Saarlouis to Sofia | 914.78 mi (1,472.19 km) |
| Saarlouis to Sopot | 975.84 mi (1,570.47 km) |
| Saarlouis to Sozopol | 1,110.06 mi (1,786.47 km) |
| Saarlouis to Sredets | 1,091.14 mi (1,756.02 km) |
| Saarlouis to Stamboliyski | 987.45 mi (1,589.14 km) |
| Saarlouis to Stara Zagora | 1,022.13 mi (1,644.96 km) |
| Saarlouis to Svilengrad | 1,071.64 mi (1,724.64 km) |
| Saarlouis to Svishtov | 965.51 mi (1,553.84 km) |
| Saarlouis to Targovishte | 1,031.65 mi (1,660.28 km) |
| Saarlouis to Teteven | 945.22 mi (1,521.18 km) |
| Saarlouis to Troyan | 965.43 mi (1,553.71 km) |
| Saarlouis to Tryavna | 999.21 mi (1,608.07 km) |
| Saarlouis to Tutrakan | 1,005.85 mi (1,618.76 km) |
| Saarlouis to Varna | 1,090.67 mi (1,755.27 km) |
