| Watervliet to Smolyan | 4,718.12 mi (7,593.08 km) |
| Watervliet to Sofia | 4,615.30 mi (7,427.61 km) |
| Watervliet to Sopot | 4,674.37 mi (7,522.67 km) |
| Watervliet to Sozopol | 4,801.26 mi (7,726.88 km) |
| Watervliet to Sredets | 4,784.55 mi (7,699.98 km) |
| Watervliet to Stamboliyski | 4,687.79 mi (7,544.27 km) |
| Watervliet to Stara Zagora | 4,719.55 mi (7,595.39 km) |
| Watervliet to Svilengrad | 4,770.44 mi (7,677.28 km) |
| Watervliet to Svishtov | 4,656.83 mi (7,494.44 km) |
| Watervliet to Targovishte | 4,721.00 mi (7,597.72 km) |
| Watervliet to Teteven | 4,643.71 mi (7,473.33 km) |
| Watervliet to Troyan | 4,663.08 mi (7,504.50 km) |
| Watervliet to Tryavna | 4,694.90 mi (7,555.71 km) |
| Watervliet to Tutrakan | 4,687.65 mi (7,544.04 km) |
| Watervliet to Varna | 4,774.41 mi (7,683.67 km) |
