| Hwlffordd to Sestu | 1,095.51 mi (1,763.06 km) |
| Hwlffordd to Settimo Torinese | 741.63 mi (1,193.53 km) |
| Hwlffordd to Seveso | 768.98 mi (1,237.55 km) |
| Hwlffordd to Sezze | 1,107.46 mi (1,782.29 km) |
| Hwlffordd to Siano | 1,200.97 mi (1,932.77 km) |
| Hwlffordd to Siena | 956.12 mi (1,538.73 km) |
| Hwlffordd to Signa | 925.76 mi (1,489.86 km) |
| Hwlffordd to Silea | 891.09 mi (1,434.07 km) |
| Hwlffordd to Silvi Paese | 1,095.55 mi (1,763.11 km) |
| Hwlffordd to Sinalunga | 975.64 mi (1,570.15 km) |
| Hwlffordd to Siniscola | 1,041.94 mi (1,676.83 km) |
| Hwlffordd to Sinnai | 1,098.61 mi (1,768.04 km) |
| Hwlffordd to Siracusa | 1,417.11 mi (2,280.62 km) |
| Hwlffordd to Solaro | 768.19 mi (1,236.28 km) |
| Hwlffordd to Soliera | 875.96 mi (1,409.72 km) |
