| Saint-Louis to Smolyan | 936.80 mi (1,507.64 km) |
| Saint-Louis to Sofia | 837.08 mi (1,347.15 km) |
| Saint-Louis to Sopot | 902.03 mi (1,451.68 km) |
| Saint-Louis to Sozopol | 1,042.72 mi (1,678.09 km) |
| Saint-Louis to Sredets | 1,022.13 mi (1,644.95 km) |
| Saint-Louis to Stamboliyski | 909.79 mi (1,464.17 km) |
| Saint-Louis to Stara Zagora | 949.49 mi (1,528.06 km) |
| Saint-Louis to Svilengrad | 996.57 mi (1,603.82 km) |
| Saint-Louis to Svishtov | 899.89 mi (1,448.23 km) |
| Saint-Louis to Targovishte | 966.71 mi (1,555.77 km) |
| Saint-Louis to Teteven | 871.76 mi (1,402.96 km) |
| Saint-Louis to Troyan | 893.05 mi (1,437.22 km) |
| Saint-Louis to Tryavna | 928.90 mi (1,494.92 km) |
| Saint-Louis to Tutrakan | 946.50 mi (1,523.24 km) |
| Saint-Louis to Varna | 1,028.79 mi (1,655.68 km) |
