| Llantrisant to Southern Pines (North Carolina) | 3,798.02 mi (6,112.33 km) |
| Llantrisant to Southfield (Michigan) | 3,624.45 mi (5,832.99 km) |
| Llantrisant to Southgate (Michigan) | 3,634.25 mi (5,848.75 km) |
| Llantrisant to Southlake (Texas) | 4,625.50 mi (7,444.02 km) |
| Llantrisant to Spanaway (Washington) | 4,726.36 mi (7,606.34 km) |
| Llantrisant to Spanish Fork (Utah) | 4,779.96 mi (7,692.61 km) |
| Llantrisant to Spanish Lake (Missouri) | 4,065.90 mi (6,543.43 km) |
| Llantrisant to Spanish Springs (Nevada) | 5,063.42 mi (8,148.78 km) |
| Llantrisant to Sparks (Nevada) | 5,069.54 mi (8,158.63 km) |
| Llantrisant to Spartanburg (South Carolina) | 3,914.26 mi (6,299.40 km) |
| Llantrisant to Spearfish (South Dakota) | 4,288.73 mi (6,902.04 km) |
| Llantrisant to Speedway (Indiana) | 3,863.13 mi (6,217.10 km) |
| Llantrisant to Spencer (Iowa) | 4,046.91 mi (6,512.87 km) |
| Llantrisant to Spokane (Washington) | 4,554.11 mi (7,329.13 km) |
| Llantrisant to Spokane Valley (Washington) | 4,548.60 mi (7,320.27 km) |
