| Risca to Southern Pines (North Carolina) | 3,808.69 mi (6,129.49 km) |
| Risca to Southfield (Michigan) | 3,633.78 mi (5,848.00 km) |
| Risca to Southgate (Michigan) | 3,643.62 mi (5,863.84 km) |
| Risca to Southlake (Texas) | 4,634.69 mi (7,458.81 km) |
| Risca to Spanaway (Washington) | 4,730.65 mi (7,613.24 km) |
| Risca to Spanish Fork (Utah) | 4,786.55 mi (7,703.21 km) |
| Risca to Spanish Lake (Missouri) | 4,075.08 mi (6,558.21 km) |
| Risca to Spanish Springs (Nevada) | 5,069.03 mi (8,157.81 km) |
| Risca to Sparks (Nevada) | 5,075.15 mi (8,167.67 km) |
| Risca to Spartanburg (South Carolina) | 3,924.73 mi (6,316.24 km) |
| Risca to Spearfish (South Dakota) | 4,295.62 mi (6,913.14 km) |
| Risca to Speedway (Indiana) | 3,872.56 mi (6,232.29 km) |
| Risca to Spencer (Iowa) | 4,054.95 mi (6,525.81 km) |
| Risca to Spokane (Washington) | 4,558.94 mi (7,336.90 km) |
| Risca to Spokane Valley (Washington) | 4,553.46 mi (7,328.08 km) |
