| Llantwit Major to Somersworth (New Hampshire) | 3,092.50 mi (4,976.90 km) |
| Llantwit Major to Somerton (Arizona) | 5,296.17 mi (8,523.36 km) |
| Llantwit Major to Somerville (Massachusetts) | 3,136.01 mi (5,046.92 km) |
| Llantwit Major to Somerville (New Jersey) | 3,356.72 mi (5,402.12 km) |
| Llantwit Major to Sonoma (California) | 5,230.13 mi (8,417.09 km) |
| Llantwit Major to Soquel (California) | 5,288.14 mi (8,510.43 km) |
| Llantwit Major to South Bend (Indiana) | 3,778.05 mi (6,080.18 km) |
| Llantwit Major to South Bradenton (Florida) | 4,303.69 mi (6,926.13 km) |
| Llantwit Major to South Burlington (Vermont) | 3,140.00 mi (5,053.34 km) |
| Llantwit Major to South Charleston (West Virginia) | 3,746.70 mi (6,029.74 km) |
| Llantwit Major to South Daytona (Florida) | 4,152.41 mi (6,682.65 km) |
| Llantwit Major to South El Monte (California) | 5,329.41 mi (8,576.86 km) |
| Llantwit Major to South Elgin (Illinois) | 3,843.35 mi (6,185.27 km) |
| Llantwit Major to South Euclid (Ohio) | 3,596.95 mi (5,788.73 km) |
| Llantwit Major to South Farmingdale (New York) | 3,302.38 mi (5,314.66 km) |
