| Castleford to Smyrna (Delaware) | 3,495.80 mi (5,625.95 km) |
| Castleford to Smyrna (Georgia) | 4,110.38 mi (6,615.02 km) |
| Castleford to Smyrna (Tennessee) | 4,082.32 mi (6,569.86 km) |
| Castleford to Snellville (Georgia) | 4,090.65 mi (6,583.26 km) |
| Castleford to Snoqualmie (Washington) | 4,624.32 mi (7,442.12 km) |
| Castleford to Snyder (Texas) | 4,790.24 mi (7,709.15 km) |
| Castleford to Socastee (South Carolina) | 3,901.56 mi (6,278.95 km) |
| Castleford to Socorro (Texas) | 5,040.16 mi (8,111.36 km) |
| Castleford to Soddy-Daisy (Tennessee) | 4,065.80 mi (6,543.28 km) |
| Castleford to Solana Beach (California) | 5,331.58 mi (8,580.34 km) |
| Castleford to Soledad (California) | 5,255.24 mi (8,457.49 km) |
| Castleford to Solon (Ohio) | 3,624.23 mi (5,832.64 km) |
| Castleford to Somers Point (New Jersey) | 3,455.17 mi (5,560.56 km) |
| Castleford to Somerset (Kentucky) | 3,953.09 mi (6,361.89 km) |
| Castleford to Somerset (New Jersey) | 3,396.01 mi (5,465.36 km) |
