| Risca to San Luis Obispo (California) | 5,349.22 mi (8,608.74 km) |
| Risca to San Marcos (California) | 5,355.65 mi (8,619.09 km) |
| Risca to San Marcos (Texas) | 4,824.35 mi (7,764.04 km) |
| Risca to San Marino (California) | 5,331.30 mi (8,579.90 km) |
| Risca to San Mateo (California) | 5,269.77 mi (8,480.87 km) |
| Risca to San Pablo (California) | 5,247.15 mi (8,444.48 km) |
| Risca to San Rafael (California) | 5,251.03 mi (8,450.71 km) |
| Risca to San Ramon (California) | 5,246.24 mi (8,443.00 km) |
| Risca to San Tan Valley (Arizona) | 5,159.79 mi (8,303.87 km) |
| Risca to Sand Springs (Oklahoma) | 4,434.10 mi (7,136.00 km) |
| Risca to Sandusky (Ohio) | 3,657.33 mi (5,885.90 km) |
| Risca to Sandy (Oregon) | 4,822.03 mi (7,760.31 km) |
| Risca to Sandy (Utah) | 4,768.78 mi (7,674.62 km) |
| Risca to Sandy Springs (Georgia) | 4,073.51 mi (6,555.68 km) |
| Risca to Sanford (Florida) | 4,196.14 mi (6,753.03 km) |
