| Llanelli to Superior (Colorado) | 4,533.13 mi (7,295.37 km) |
| Llanelli to Superior (Wisconsin) | 3,737.83 mi (6,015.45 km) |
| Llanelli to Surprise (Arizona) | 5,122.84 mi (8,244.41 km) |
| Llanelli to Susanville (California) | 5,018.46 mi (8,076.43 km) |
| Llanelli to Sussex (Wisconsin) | 3,753.09 mi (6,040.01 km) |
| Llanelli to Suwanee (Georgia) | 4,010.04 mi (6,453.53 km) |
| Llanelli to Swansea (Illinois) | 4,033.64 mi (6,491.52 km) |
| Llanelli to Sweetwater (Florida) | 4,262.25 mi (6,859.42 km) |
| Llanelli to Sweetwater (Texas) | 4,742.25 mi (7,631.92 km) |
| Llanelli to Sycamore (Illinois) | 3,822.35 mi (6,151.48 km) |
| Llanelli to Sylacauga (Alabama) | 4,142.34 mi (6,666.45 km) |
| Llanelli to Sylvania (Ohio) | 3,641.04 mi (5,859.69 km) |
| Llanelli to Syosset (New York) | 3,266.82 mi (5,257.45 km) |
| Llanelli to Syracuse (New York) | 3,281.46 mi (5,281.00 km) |
| Llanelli to Syracuse (Utah) | 4,709.68 mi (7,579.50 km) |
