| Staines-upon-Thames to Sestu | 957.42 mi (1,540.82 km) |
| Staines-upon-Thames to Settimo Torinese | 577.52 mi (929.43 km) |
| Staines-upon-Thames to Seveso | 594.84 mi (957.31 km) |
| Staines-upon-Thames to Sezze | 939.72 mi (1,512.33 km) |
| Staines-upon-Thames to Siano | 1,030.45 mi (1,658.35 km) |
| Staines-upon-Thames to Siena | 786.46 mi (1,265.69 km) |
| Staines-upon-Thames to Signa | 754.60 mi (1,214.41 km) |
| Staines-upon-Thames to Silea | 707.43 mi (1,138.51 km) |
| Staines-upon-Thames to Silvi Paese | 920.00 mi (1,480.60 km) |
| Staines-upon-Thames to Sinalunga | 804.96 mi (1,295.46 km) |
| Staines-upon-Thames to Siniscola | 894.21 mi (1,439.09 km) |
| Staines-upon-Thames to Sinnai | 959.82 mi (1,544.68 km) |
| Staines-upon-Thames to Siracusa | 1,257.84 mi (2,024.29 km) |
| Staines-upon-Thames to Solaro | 594.45 mi (956.68 km) |
| Staines-upon-Thames to Soliera | 700.43 mi (1,127.24 km) |
