| Risca to Cookeville (Tennessee) | 4,014.10 mi (6,460.08 km) |
| Risca to Coolidge (Arizona) | 5,171.72 mi (8,323.08 km) |
| Risca to Coon Rapids (Minnesota) | 3,892.82 mi (6,264.88 km) |
| Risca to Cooper City (Florida) | 4,291.20 mi (6,906.01 km) |
| Risca to Coos Bay (Oregon) | 4,991.94 mi (8,033.76 km) |
| Risca to Copiague (New York) | 3,314.12 mi (5,333.56 km) |
| Risca to Coppell (Texas) | 4,627.97 mi (7,448.00 km) |
| Risca to Copperas Cove (Texas) | 4,758.94 mi (7,658.77 km) |
| Risca to Coral Gables (Florida) | 4,307.83 mi (6,932.78 km) |
| Risca to Coral Springs (Florida) | 4,278.78 mi (6,886.04 km) |
| Risca to Coral Terrace (Florida) | 4,307.10 mi (6,931.60 km) |
| Risca to Coralville (Iowa) | 3,990.79 mi (6,422.55 km) |
| Risca to Coram (New York) | 3,289.24 mi (5,293.52 km) |
| Risca to Corcoran (California) | 5,267.44 mi (8,477.12 km) |
| Risca to Cordele (Georgia) | 4,144.77 mi (6,670.36 km) |
