| Cwmbran to Southern Pines (North Carolina) | 3,810.81 mi (6,132.91 km) |
| Cwmbran to Southfield (Michigan) | 3,635.27 mi (5,850.40 km) |
| Cwmbran to Southgate (Michigan) | 3,645.13 mi (5,866.27 km) |
| Cwmbran to Southlake (Texas) | 4,636.12 mi (7,461.11 km) |
| Cwmbran to Spanaway (Washington) | 4,730.17 mi (7,612.47 km) |
| Cwmbran to Spanish Fork (Utah) | 4,786.91 mi (7,703.79 km) |
| Cwmbran to Spanish Lake (Missouri) | 4,076.51 mi (6,560.51 km) |
| Cwmbran to Spanish Springs (Nevada) | 5,069.02 mi (8,157.80 km) |
| Cwmbran to Sparks (Nevada) | 5,075.15 mi (8,167.66 km) |
| Cwmbran to Spartanburg (South Carolina) | 3,926.76 mi (6,319.50 km) |
| Cwmbran to Spearfish (South Dakota) | 4,296.11 mi (6,913.92 km) |
| Cwmbran to Speedway (Indiana) | 3,874.10 mi (6,234.77 km) |
| Cwmbran to Spencer (Iowa) | 4,055.89 mi (6,527.33 km) |
| Cwmbran to Spokane (Washington) | 4,558.65 mi (7,336.44 km) |
| Cwmbran to Spokane Valley (Washington) | 4,553.18 mi (7,327.63 km) |
