| Swansea to Smithville (Missouri) | 253.23 mi (407.54 km) |
| Swansea to Smyrna (Delaware) | 773.74 mi (1,245.22 km) |
| Swansea to Smyrna (Georgia) | 444.63 mi (715.56 km) |
| Swansea to Smyrna (Tennessee) | 260.76 mi (419.65 km) |
| Swansea to Snellville (Georgia) | 465.02 mi (748.38 km) |
| Swansea to Snoqualmie (Washington) | 1,709.40 mi (2,751.02 km) |
| Swansea to Snyder (Texas) | 733.43 mi (1,180.34 km) |
| Swansea to Socastee (South Carolina) | 698.07 mi (1,123.44 km) |
| Swansea to Socorro (Texas) | 1,034.46 mi (1,664.80 km) |
| Swansea to Soddy-Daisy (Tennessee) | 349.86 mi (563.04 km) |
| Swansea to Solana Beach (California) | 1,569.93 mi (2,526.55 km) |
| Swansea to Soledad (California) | 1,716.73 mi (2,762.82 km) |
| Swansea to Solon (Ohio) | 492.83 mi (793.13 km) |
| Swansea to Somers Point (New Jersey) | 827.26 mi (1,331.35 km) |
| Swansea to Somerset (Kentucky) | 310.34 mi (499.44 km) |
