| Watertown Town to Sesena | 3,414.32 mi (5,494.82 km) |
| Watertown Town to Sestao | 3,353.43 mi (5,396.82 km) |
| Watertown Town to Sevilla | 3,392.95 mi (5,460.43 km) |
| Watertown Town to Sevilla La Nueva | 3,391.28 mi (5,457.74 km) |
| Watertown Town to Silla | 3,593.31 mi (5,782.87 km) |
| Watertown Town to Silleda | 3,126.59 mi (5,031.76 km) |
| Watertown Town to Sitges | 3,637.11 mi (5,853.36 km) |
| Watertown Town to Socuellamos | 3,482.30 mi (5,604.22 km) |
| Watertown Town to Soller | 3,726.18 mi (5,996.70 km) |
| Watertown Town to Solsona | 3,600.10 mi (5,793.80 km) |
| Watertown Town to Son Servera | 3,761.79 mi (6,054.01 km) |
| Watertown Town to Sonseca | 3,414.62 mi (5,495.30 km) |
| Watertown Town to Sopelana | 3,352.68 mi (5,395.62 km) |
| Watertown Town to Soria | 3,422.62 mi (5,508.17 km) |
| Watertown Town to Suances | 3,301.95 mi (5,313.97 km) |
