| Risca to Commerce City (Colorado) | 4,566.43 mi (7,348.96 km) |
| Risca to Compton (California) | 5,348.02 mi (8,606.81 km) |
| Risca to Comstock Park (Michigan) | 3,702.83 mi (5,959.12 km) |
| Risca to Concord (California) | 5,236.23 mi (8,426.89 km) |
| Risca to Concord (Missouri) | 4,094.13 mi (6,588.87 km) |
| Risca to Concord (New Hampshire) | 3,132.63 mi (5,041.49 km) |
| Risca to Concord (North Carolina) | 3,850.37 mi (6,196.57 km) |
| Risca to Conneaut (Ohio) | 3,551.31 mi (5,715.28 km) |
| Risca to Connersville (Indiana) | 3,834.99 mi (6,171.82 km) |
| Risca to Conroe (Texas) | 4,703.70 mi (7,569.87 km) |
| Risca to Converse (Texas) | 4,858.03 mi (7,818.24 km) |
| Risca to Conway (Arkansas) | 4,344.31 mi (6,991.50 km) |
| Risca to Conway (Florida) | 4,213.00 mi (6,780.17 km) |
| Risca to Conway (South Carolina) | 3,857.34 mi (6,207.80 km) |
| Risca to Conyers (Georgia) | 4,071.26 mi (6,552.06 km) |
