| River Falls to Smolyan | 5,320.81 mi (8,563.02 km) |
| River Falls to Sofia | 5,216.55 mi (8,395.23 km) |
| River Falls to Sopot | 5,266.29 mi (8,475.27 km) |
| River Falls to Sozopol | 5,374.40 mi (8,649.26 km) |
| River Falls to Sredets | 5,361.97 mi (8,629.25 km) |
| River Falls to Stamboliyski | 5,286.30 mi (8,507.47 km) |
| River Falls to Stara Zagora | 5,307.27 mi (8,541.22 km) |
| River Falls to Svilengrad | 5,360.72 mi (8,627.24 km) |
| River Falls to Svishtov | 5,234.93 mi (8,424.80 km) |
| River Falls to Targovishte | 5,294.03 mi (8,519.93 km) |
| River Falls to Teteven | 5,236.35 mi (8,427.09 km) |
| River Falls to Troyan | 5,252.92 mi (8,453.76 km) |
| River Falls to Tryavna | 5,279.41 mi (8,496.38 km) |
| River Falls to Tutrakan | 5,252.47 mi (8,453.04 km) |
| River Falls to Varna | 5,338.17 mi (8,590.95 km) |
