| Risca to Castle Rock (Colorado) | 4,592.00 mi (7,390.11 km) |
| Risca to Castro Valley (California) | 5,253.17 mi (8,454.15 km) |
| Risca to Catalina Foothills (Arizona) | 5,183.44 mi (8,341.94 km) |
| Risca to Cataño (Puerto Rico) | 4,077.26 mi (6,561.72 km) |
| Risca to Cathedral City (California) | 5,292.43 mi (8,517.35 km) |
| Risca to Catonsville (Maryland) | 3,513.15 mi (5,653.87 km) |
| Risca to Cave Spring (Virginia) | 3,739.31 mi (6,017.83 km) |
| Risca to Cayce (South Carolina) | 3,935.63 mi (6,333.79 km) |
| Risca to Cayey (Puerto Rico) | 4,095.10 mi (6,590.42 km) |
| Risca to Cedar City (Utah) | 4,966.52 mi (7,992.84 km) |
| Risca to Cedar Falls (Iowa) | 3,984.57 mi (6,412.55 km) |
| Risca to Cedar Hill (Texas) | 4,646.33 mi (7,477.54 km) |
| Risca to Cedar Lake (Indiana) | 3,846.64 mi (6,190.57 km) |
| Risca to Cedar Mill (Oregon) | 4,829.13 mi (7,771.74 km) |
| Risca to Cedar Park (Texas) | 4,786.73 mi (7,703.50 km) |
