| Twickenham to Sestu | 954.29 mi (1,535.78 km) |
| Twickenham to Settimo Torinese | 573.06 mi (922.26 km) |
| Twickenham to Seveso | 589.65 mi (948.96 km) |
| Twickenham to Sezze | 934.83 mi (1,504.46 km) |
| Twickenham to Siano | 1,025.35 mi (1,650.15 km) |
| Twickenham to Siena | 781.50 mi (1,257.70 km) |
| Twickenham to Signa | 749.54 mi (1,206.27 km) |
| Twickenham to Silea | 701.43 mi (1,128.84 km) |
| Twickenham to Silvi Paese | 914.58 mi (1,471.88 km) |
| Twickenham to Sinalunga | 799.92 mi (1,287.34 km) |
| Twickenham to Siniscola | 890.57 mi (1,433.23 km) |
| Twickenham to Sinnai | 956.65 mi (1,539.57 km) |
| Twickenham to Siracusa | 1,253.39 mi (2,017.14 km) |
| Twickenham to Solaro | 589.29 mi (948.37 km) |
| Twickenham to Soliera | 695.09 mi (1,118.63 km) |
