| Porthcawl to Sinop | 1,924.64 mi (3,097.41 km) |
| Porthcawl to Siran | 2,167.08 mi (3,487.58 km) |
| Porthcawl to Sirnak | 2,421.29 mi (3,896.70 km) |
| Porthcawl to Sirvan | 2,379.55 mi (3,829.52 km) |
| Porthcawl to Sivas | 2,094.52 mi (3,370.81 km) |
| Porthcawl to Sivasli | 1,839.29 mi (2,960.06 km) |
| Porthcawl to Siverek | 2,276.99 mi (3,664.46 km) |
| Porthcawl to Sivrice | 2,246.98 mi (3,616.17 km) |
| Porthcawl to Sivrihisar | 1,874.55 mi (3,016.80 km) |
| Porthcawl to Sogut | 1,793.52 mi (2,886.39 km) |
| Porthcawl to Sogutlu | 1,769.79 mi (2,848.20 km) |
| Porthcawl to Soke | 1,779.60 mi (2,863.99 km) |
| Porthcawl to Solhan | 2,299.73 mi (3,701.06 km) |
| Porthcawl to Soma | 1,722.46 mi (2,772.03 km) |
| Porthcawl to Sorgun | 2,013.93 mi (3,241.11 km) |
