| Somerville to Smolyan | 4,625.43 mi (7,443.90 km) |
| Somerville to Sofia | 4,523.12 mi (7,279.26 km) |
| Somerville to Sopot | 4,583.29 mi (7,376.09 km) |
| Somerville to Sozopol | 4,712.37 mi (7,583.82 km) |
| Somerville to Sredets | 4,695.12 mi (7,556.06 km) |
| Somerville to Stamboliyski | 4,595.76 mi (7,396.16 km) |
| Somerville to Stara Zagora | 4,628.91 mi (7,449.52 km) |
| Somerville to Svilengrad | 4,679.29 mi (7,530.60 km) |
| Somerville to Svishtov | 4,567.71 mi (7,351.02 km) |
| Somerville to Targovishte | 4,632.38 mi (7,455.09 km) |
| Somerville to Teteven | 4,552.63 mi (7,326.75 km) |
| Somerville to Troyan | 4,572.32 mi (7,358.44 km) |
| Somerville to Tryavna | 4,604.78 mi (7,410.67 km) |
| Somerville to Tutrakan | 4,600.27 mi (7,403.41 km) |
| Somerville to Varna | 4,686.90 mi (7,542.83 km) |
