| Watertown Town to Sestu | 4,037.44 mi (6,497.63 km) |
| Watertown Town to Settimo Torinese | 3,780.72 mi (6,084.48 km) |
| Watertown Town to Seveso | 3,823.42 mi (6,153.20 km) |
| Watertown Town to Sezze | 4,136.25 mi (6,656.65 km) |
| Watertown Town to Siano | 4,233.57 mi (6,813.28 km) |
| Watertown Town to Siena | 3,995.73 mi (6,430.51 km) |
| Watertown Town to Signa | 3,969.67 mi (6,388.57 km) |
| Watertown Town to Silea | 3,957.19 mi (6,368.47 km) |
| Watertown Town to Silvi Paese | 4,143.88 mi (6,668.92 km) |
| Watertown Town to Sinalunga | 4,016.74 mi (6,464.31 km) |
| Watertown Town to Siniscola | 4,019.41 mi (6,468.62 km) |
| Watertown Town to Sinnai | 4,042.41 mi (6,505.62 km) |
| Watertown Town to Siracusa | 4,403.45 mi (7,086.67 km) |
| Watertown Town to Solaro | 3,822.04 mi (6,150.99 km) |
| Watertown Town to Soliera | 3,929.71 mi (6,324.26 km) |
