| Severn to Smolyan | 4,994.46 mi (8,037.81 km) |
| Severn to Sofia | 4,892.14 mi (7,873.13 km) |
| Severn to Sopot | 4,952.24 mi (7,969.86 km) |
| Severn to Sozopol | 5,081.06 mi (8,177.18 km) |
| Severn to Sredets | 5,063.89 mi (8,149.55 km) |
| Severn to Stamboliyski | 4,964.77 mi (7,990.03 km) |
| Severn to Stara Zagora | 4,997.83 mi (8,043.23 km) |
| Severn to Svilengrad | 5,048.25 mi (8,124.38 km) |
| Severn to Svishtov | 4,936.43 mi (7,944.42 km) |
| Severn to Targovishte | 5,001.02 mi (8,048.37 km) |
| Severn to Teteven | 4,921.58 mi (7,920.52 km) |
| Severn to Troyan | 4,941.24 mi (7,952.16 km) |
| Severn to Tryavna | 4,973.63 mi (8,004.29 km) |
| Severn to Tutrakan | 4,968.68 mi (7,996.32 km) |
| Severn to Varna | 5,055.34 mi (8,135.79 km) |
