| Llanelli to Security-Widefield (Colorado) | 4,578.29 mi (7,368.05 km) |
| Llanelli to Sedalia (Missouri) | 4,152.57 mi (6,682.91 km) |
| Llanelli to Sedro-Woolley (Washington) | 4,613.16 mi (7,424.16 km) |
| Llanelli to Seguin (Texas) | 4,795.91 mi (7,718.27 km) |
| Llanelli to Selden (New York) | 3,245.65 mi (5,223.37 km) |
| Llanelli to Selma (Alabama) | 4,211.29 mi (6,777.42 km) |
| Llanelli to Selma (California) | 5,203.76 mi (8,374.65 km) |
| Llanelli to Selma (Texas) | 4,809.75 mi (7,740.54 km) |
| Llanelli to Seminole (Florida) | 4,260.68 mi (6,856.89 km) |
| Llanelli to Seven Hills (Ohio) | 3,574.69 mi (5,752.90 km) |
| Llanelli to Seven Oaks (South Carolina) | 3,889.14 mi (6,258.97 km) |
| Llanelli to Severn (Maryland) | 3,471.33 mi (5,586.56 km) |
| Llanelli to Severna Park (Maryland) | 3,468.24 mi (5,581.59 km) |
| Llanelli to Sevierville (Tennessee) | 3,902.11 mi (6,279.85 km) |
| Llanelli to Seymour (Indiana) | 3,853.02 mi (6,200.84 km) |
