| Llanelli to Smyrna (Delaware) | 3,419.49 mi (5,503.14 km) |
| Llanelli to Smyrna (Georgia) | 4,037.50 mi (6,497.73 km) |
| Llanelli to Smyrna (Tennessee) | 4,018.63 mi (6,467.36 km) |
| Llanelli to Snellville (Georgia) | 4,016.71 mi (6,464.27 km) |
| Llanelli to Snoqualmie (Washington) | 4,656.93 mi (7,494.61 km) |
| Llanelli to Snyder (Texas) | 4,748.94 mi (7,642.68 km) |
| Llanelli to Socastee (South Carolina) | 3,817.15 mi (6,143.11 km) |
| Llanelli to Socorro (Texas) | 5,008.27 mi (8,060.03 km) |
| Llanelli to Soddy-Daisy (Tennessee) | 3,997.63 mi (6,433.57 km) |
| Llanelli to Solana Beach (California) | 5,326.94 mi (8,572.88 km) |
| Llanelli to Soledad (California) | 5,266.06 mi (8,474.90 km) |
| Llanelli to Solon (Ohio) | 3,565.07 mi (5,737.43 km) |
| Llanelli to Somers Point (New Jersey) | 3,377.01 mi (5,434.77 km) |
| Llanelli to Somerset (Kentucky) | 3,888.38 mi (6,257.74 km) |
| Llanelli to Somerset (New Jersey) | 3,321.14 mi (5,344.86 km) |
