| Llantwit Major to Southern Pines (North Carolina) | 3,796.19 mi (6,109.38 km) |
| Llantwit Major to Southfield (Michigan) | 3,624.29 mi (5,832.72 km) |
| Llantwit Major to Southgate (Michigan) | 3,634.02 mi (5,848.40 km) |
| Llantwit Major to Southlake (Texas) | 4,625.47 mi (7,443.98 km) |
| Llantwit Major to Spanaway (Washington) | 4,730.81 mi (7,613.51 km) |
| Llantwit Major to Spanish Fork (Utah) | 4,782.52 mi (7,696.73 km) |
| Llantwit Major to Spanish Lake (Missouri) | 4,065.89 mi (6,543.42 km) |
| Llantwit Major to Spanish Springs (Nevada) | 5,066.82 mi (8,154.25 km) |
| Llantwit Major to Sparks (Nevada) | 5,072.93 mi (8,164.10 km) |
| Llantwit Major to Spartanburg (South Carolina) | 3,912.69 mi (6,296.87 km) |
| Llantwit Major to Spearfish (South Dakota) | 4,291.01 mi (6,905.72 km) |
| Llantwit Major to Speedway (Indiana) | 3,862.83 mi (6,216.63 km) |
| Llantwit Major to Spencer (Iowa) | 4,048.10 mi (6,514.79 km) |
| Llantwit Major to Spokane (Washington) | 4,558.14 mi (7,335.62 km) |
| Llantwit Major to Spokane Valley (Washington) | 4,552.62 mi (7,326.73 km) |
