| Portishead to Sinop | 1,884.90 mi (3,033.45 km) |
| Portishead to Siran | 2,127.32 mi (3,423.59 km) |
| Portishead to Sirnak | 2,381.60 mi (3,832.81 km) |
| Portishead to Sirvan | 2,339.83 mi (3,765.59 km) |
| Portishead to Sivas | 2,054.95 mi (3,307.12 km) |
| Portishead to Sivasli | 1,801.13 mi (2,898.64 km) |
| Portishead to Siverek | 2,237.50 mi (3,600.91 km) |
| Portishead to Sivrice | 2,207.40 mi (3,552.47 km) |
| Portishead to Sivrihisar | 1,835.71 mi (2,954.29 km) |
| Portishead to Sogut | 1,754.75 mi (2,824.00 km) |
| Portishead to Sogutlu | 1,730.72 mi (2,785.32 km) |
| Portishead to Soke | 1,742.33 mi (2,804.01 km) |
| Portishead to Solhan | 2,259.98 mi (3,637.09 km) |
| Portishead to Soma | 1,684.54 mi (2,711.00 km) |
| Portishead to Sorgun | 1,974.52 mi (3,177.68 km) |
