| Llantwit Major to San Luis Obispo (California) | 5,346.29 mi (8,604.02 km) |
| Llantwit Major to San Marcos (California) | 5,351.35 mi (8,612.17 km) |
| Llantwit Major to San Marcos (Texas) | 4,814.57 mi (7,748.29 km) |
| Llantwit Major to San Marino (California) | 5,327.46 mi (8,573.72 km) |
| Llantwit Major to San Mateo (California) | 5,267.75 mi (8,477.63 km) |
| Llantwit Major to San Pablo (California) | 5,245.23 mi (8,441.39 km) |
| Llantwit Major to San Rafael (California) | 5,249.16 mi (8,447.70 km) |
| Llantwit Major to San Ramon (California) | 5,244.17 mi (8,439.68 km) |
| Llantwit Major to San Tan Valley (Arizona) | 5,154.07 mi (8,294.68 km) |
| Llantwit Major to Sand Springs (Oklahoma) | 4,425.47 mi (7,122.11 km) |
| Llantwit Major to Sandusky (Ohio) | 3,647.39 mi (5,869.90 km) |
| Llantwit Major to Sandy (Oregon) | 4,821.77 mi (7,759.88 km) |
| Llantwit Major to Sandy (Utah) | 4,764.92 mi (7,668.40 km) |
| Llantwit Major to Sandy Springs (Georgia) | 4,061.72 mi (6,536.71 km) |
| Llantwit Major to Sanford (Florida) | 4,182.41 mi (6,730.94 km) |
