| Towcester to Sestu | 1,008.97 mi (1,623.79 km) |
| Towcester to Settimo Torinese | 626.46 mi (1,008.18 km) |
| Towcester to Seveso | 641.20 mi (1,031.91 km) |
| Towcester to Sezze | 987.14 mi (1,588.64 km) |
| Towcester to Siano | 1,077.03 mi (1,733.32 km) |
| Towcester to Siena | 833.64 mi (1,341.61 km) |
| Towcester to Signa | 801.43 mi (1,289.78 km) |
| Towcester to Silea | 749.42 mi (1,206.07 km) |
| Towcester to Silvi Paese | 965.17 mi (1,553.29 km) |
| Towcester to Sinalunga | 851.83 mi (1,370.89 km) |
| Towcester to Siniscola | 944.99 mi (1,520.82 km) |
| Towcester to Sinnai | 1,011.32 mi (1,627.56 km) |
| Towcester to Siracusa | 1,306.70 mi (2,102.93 km) |
| Towcester to Solaro | 640.94 mi (1,031.49 km) |
| Towcester to Soliera | 746.04 mi (1,200.63 km) |
