| Slough to Sestu | 963.54 mi (1,550.67 km) |
| Slough to Settimo Torinese | 583.52 mi (939.08 km) |
| Slough to Seveso | 600.64 mi (966.64 km) |
| Slough to Sezze | 945.61 mi (1,521.82 km) |
| Slough to Siano | 1,036.28 mi (1,667.74 km) |
| Slough to Siena | 792.33 mi (1,275.14 km) |
| Slough to Signa | 760.44 mi (1,223.81 km) |
| Slough to Silea | 712.85 mi (1,147.22 km) |
| Slough to Silvi Paese | 925.72 mi (1,489.80 km) |
| Slough to Sinalunga | 810.81 mi (1,304.87 km) |
| Slough to Siniscola | 900.31 mi (1,448.91 km) |
| Slough to Sinnai | 965.94 mi (1,554.53 km) |
| Slough to Siracusa | 1,263.84 mi (2,033.95 km) |
| Slough to Solaro | 600.26 mi (966.03 km) |
| Slough to Soliera | 706.18 mi (1,136.48 km) |
