| Porthcawl to Sestu | 1,042.21 mi (1,677.28 km) |
| Porthcawl to Settimo Torinese | 683.84 mi (1,100.54 km) |
| Porthcawl to Seveso | 710.23 mi (1,143.00 km) |
| Porthcawl to Sezze | 1,049.53 mi (1,689.05 km) |
| Porthcawl to Siano | 1,142.75 mi (1,839.08 km) |
| Porthcawl to Siena | 897.90 mi (1,445.02 km) |
| Porthcawl to Signa | 867.36 mi (1,395.88 km) |
| Porthcawl to Silea | 831.92 mi (1,338.84 km) |
| Porthcawl to Silvi Paese | 1,036.81 mi (1,668.58 km) |
| Porthcawl to Sinalunga | 917.32 mi (1,476.28 km) |
| Porthcawl to Siniscola | 986.88 mi (1,588.23 km) |
| Porthcawl to Sinnai | 1,045.19 mi (1,682.06 km) |
| Porthcawl to Siracusa | 1,360.48 mi (2,189.48 km) |
| Porthcawl to Solaro | 709.47 mi (1,141.78 km) |
| Porthcawl to Soliera | 817.15 mi (1,315.07 km) |
