| Pontneddfechan to Smyrna (Delaware) | 3,441.93 mi (5,539.24 km) |
| Pontneddfechan to Smyrna (Georgia) | 4,059.75 mi (6,533.54 km) |
| Pontneddfechan to Smyrna (Tennessee) | 4,040.22 mi (6,502.10 km) |
| Pontneddfechan to Snellville (Georgia) | 4,039.04 mi (6,500.20 km) |
| Pontneddfechan to Snoqualmie (Washington) | 4,669.06 mi (7,514.12 km) |
| Pontneddfechan to Snyder (Texas) | 4,768.78 mi (7,674.62 km) |
| Pontneddfechan to Socastee (South Carolina) | 3,840.15 mi (6,180.12 km) |
| Pontneddfechan to Socorro (Texas) | 5,027.30 mi (8,090.66 km) |
| Pontneddfechan to Soddy-Daisy (Tennessee) | 4,019.55 mi (6,468.83 km) |
| Pontneddfechan to Solana Beach (California) | 5,343.35 mi (8,599.28 km) |
| Pontneddfechan to Soledad (California) | 5,280.79 mi (8,498.62 km) |
| Pontneddfechan to Solon (Ohio) | 3,586.27 mi (5,771.54 km) |
| Pontneddfechan to Somers Point (New Jersey) | 3,399.56 mi (5,471.07 km) |
| Pontneddfechan to Somerset (Kentucky) | 3,910.03 mi (6,292.58 km) |
| Pontneddfechan to Somerset (New Jersey) | 3,343.47 mi (5,380.79 km) |
