| Naugatuck to Smolyan | 4,743.04 mi (7,633.18 km) |
| Naugatuck to Sofia | 4,640.67 mi (7,468.44 km) |
| Naugatuck to Sopot | 4,700.72 mi (7,565.08 km) |
| Naugatuck to Sozopol | 4,829.52 mi (7,772.36 km) |
| Naugatuck to Sredets | 4,812.35 mi (7,744.72 km) |
| Naugatuck to Stamboliyski | 4,713.30 mi (7,585.33 km) |
| Naugatuck to Stara Zagora | 4,746.30 mi (7,638.42 km) |
| Naugatuck to Svilengrad | 4,796.74 mi (7,719.60 km) |
| Naugatuck to Svishtov | 4,684.89 mi (7,539.60 km) |
| Naugatuck to Targovishte | 4,749.49 mi (7,643.56 km) |
| Naugatuck to Teteven | 4,670.06 mi (7,515.74 km) |
| Naugatuck to Troyan | 4,689.72 mi (7,547.37 km) |
| Naugatuck to Tryavna | 4,722.09 mi (7,599.47 km) |
| Naugatuck to Tutrakan | 4,717.19 mi (7,591.58 km) |
| Naugatuck to Varna | 4,803.84 mi (7,731.04 km) |
