| Mettlach to Smolyan | 1,028.52 mi (1,655.24 km) |
| Mettlach to Sofia | 925.95 mi (1,490.18 km) |
| Mettlach to Sopot | 986.67 mi (1,587.89 km) |
| Mettlach to Sozopol | 1,120.28 mi (1,802.91 km) |
| Mettlach to Sredets | 1,101.51 mi (1,772.70 km) |
| Mettlach to Stamboliyski | 998.59 mi (1,607.07 km) |
| Mettlach to Stara Zagora | 1,032.84 mi (1,662.19 km) |
| Mettlach to Svilengrad | 1,082.53 mi (1,742.16 km) |
| Mettlach to Svishtov | 975.65 mi (1,570.16 km) |
| Mettlach to Targovishte | 1,041.69 mi (1,676.45 km) |
| Mettlach to Teteven | 956.03 mi (1,538.58 km) |
| Mettlach to Troyan | 976.15 mi (1,570.95 km) |
| Mettlach to Tryavna | 1,009.73 mi (1,625.01 km) |
| Mettlach to Tutrakan | 1,015.42 mi (1,634.16 km) |
| Mettlach to Varna | 1,100.42 mi (1,770.95 km) |
