| Castleford to Sinop | 1,848.03 mi (2,974.11 km) |
| Castleford to Siran | 2,088.50 mi (3,361.12 km) |
| Castleford to Sirnak | 2,344.97 mi (3,773.87 km) |
| Castleford to Sirvan | 2,302.24 mi (3,705.09 km) |
| Castleford to Sivas | 2,023.73 mi (3,256.88 km) |
| Castleford to Sivasli | 1,798.75 mi (2,894.81 km) |
| Castleford to Siverek | 2,208.38 mi (3,554.05 km) |
| Castleford to Sivrice | 2,175.46 mi (3,501.07 km) |
| Castleford to Sivrihisar | 1,822.38 mi (2,932.84 km) |
| Castleford to Sogut | 1,743.08 mi (2,805.21 km) |
| Castleford to Sogutlu | 1,713.47 mi (2,757.57 km) |
| Castleford to Soke | 1,751.75 mi (2,819.18 km) |
| Castleford to Solhan | 2,221.31 mi (3,574.85 km) |
| Castleford to Soma | 1,686.17 mi (2,713.62 km) |
| Castleford to Sorgun | 1,948.20 mi (3,135.32 km) |
