| Llantwit Major to Smyrna (Delaware) | 3,453.12 mi (5,557.25 km) |
| Llantwit Major to Smyrna (Georgia) | 4,071.28 mi (6,552.10 km) |
| Llantwit Major to Smyrna (Tennessee) | 4,052.91 mi (6,522.53 km) |
| Llantwit Major to Snellville (Georgia) | 4,050.43 mi (6,518.54 km) |
| Llantwit Major to Snoqualmie (Washington) | 4,690.66 mi (7,548.89 km) |
| Llantwit Major to Snyder (Texas) | 4,783.97 mi (7,699.05 km) |
| Llantwit Major to Socastee (South Carolina) | 3,850.17 mi (6,196.24 km) |
| Llantwit Major to Socorro (Texas) | 5,043.45 mi (8,116.64 km) |
| Llantwit Major to Soddy-Daisy (Tennessee) | 4,031.68 mi (6,488.37 km) |
| Llantwit Major to Solana Beach (California) | 5,362.05 mi (8,629.39 km) |
| Llantwit Major to Soledad (California) | 5,300.79 mi (8,530.79 km) |
| Llantwit Major to Solon (Ohio) | 3,599.59 mi (5,792.97 km) |
| Llantwit Major to Somers Point (New Jersey) | 3,410.52 mi (5,488.69 km) |
| Llantwit Major to Somerset (Kentucky) | 3,922.62 mi (6,312.84 km) |
| Llantwit Major to Somerset (New Jersey) | 3,354.86 mi (5,399.13 km) |
