| Risca to Coldwater (Michigan) | 3,725.44 mi (5,995.52 km) |
| Risca to Colesville (Maryland) | 3,532.27 mi (5,684.64 km) |
| Risca to College (Alaska) | 4,171.80 mi (6,713.87 km) |
| Risca to College Park (Georgia) | 4,091.86 mi (6,585.21 km) |
| Risca to College Park (Maryland) | 3,532.92 mi (5,685.69 km) |
| Risca to College Station (Texas) | 4,722.63 mi (7,600.33 km) |
| Risca to Collegedale (Tennessee) | 4,047.65 mi (6,514.06 km) |
| Risca to Colleyville (Texas) | 4,637.86 mi (7,463.91 km) |
| Risca to Collierville (Tennessee) | 4,235.66 mi (6,816.64 km) |
| Risca to Collinsville (Illinois) | 4,072.54 mi (6,554.11 km) |
| Risca to Colonia (New Jersey) | 3,355.47 mi (5,400.11 km) |
| Risca to Colonial Heights (Virginia) | 3,629.82 mi (5,841.63 km) |
| Risca to Colonial Park (Pennsylvania) | 3,470.39 mi (5,585.05 km) |
| Risca to Colorado Springs (Colorado) | 4,615.04 mi (7,427.18 km) |
| Risca to Colton (California) | 5,309.05 mi (8,544.09 km) |
