| Colwyn Bay to Sestu | 1,139.55 mi (1,833.93 km) |
| Colwyn Bay to Settimo Torinese | 763.35 mi (1,228.49 km) |
| Colwyn Bay to Seveso | 779.80 mi (1,254.97 km) |
| Colwyn Bay to Sezze | 1,125.31 mi (1,811.00 km) |
| Colwyn Bay to Siano | 1,215.60 mi (1,956.32 km) |
| Colwyn Bay to Siena | 971.93 mi (1,564.17 km) |
| Colwyn Bay to Signa | 939.88 mi (1,512.59 km) |
| Colwyn Bay to Silea | 887.87 mi (1,428.88 km) |
| Colwyn Bay to Silvi Paese | 1,104.04 mi (1,776.77 km) |
| Colwyn Bay to Sinalunga | 990.27 mi (1,593.68 km) |
| Colwyn Bay to Siniscola | 1,078.48 mi (1,735.64 km) |
| Colwyn Bay to Sinnai | 1,142.14 mi (1,838.10 km) |
| Colwyn Bay to Siracusa | 1,443.65 mi (2,323.33 km) |
| Colwyn Bay to Solaro | 779.49 mi (1,254.48 km) |
| Colwyn Bay to Soliera | 884.83 mi (1,424.00 km) |
