| Watertown to Smolyan | 4,753.21 mi (7,649.55 km) |
| Watertown to Sofia | 4,649.82 mi (7,483.16 km) |
| Watertown to Sopot | 4,707.29 mi (7,575.66 km) |
| Watertown to Sozopol | 4,831.06 mi (7,774.84 km) |
| Watertown to Sredets | 4,815.09 mi (7,749.14 km) |
| Watertown to Stamboliyski | 4,722.00 mi (7,599.32 km) |
| Watertown to Stara Zagora | 4,751.82 mi (7,647.32 km) |
| Watertown to Svilengrad | 4,803.34 mi (7,730.23 km) |
| Watertown to Svishtov | 4,687.11 mi (7,543.17 km) |
| Watertown to Targovishte | 4,750.53 mi (7,645.25 km) |
| Watertown to Teteven | 4,676.68 mi (7,526.39 km) |
| Watertown to Troyan | 4,695.58 mi (7,556.80 km) |
| Watertown to Tryavna | 4,726.49 mi (7,606.55 km) |
| Watertown to Tutrakan | 4,715.56 mi (7,588.96 km) |
| Watertown to Varna | 4,802.40 mi (7,728.71 km) |
