| Risca to Cloverly (Maryland) | 3,530.73 mi (5,682.16 km) |
| Risca to Clovis (California) | 5,229.19 mi (8,415.57 km) |
| Risca to Clovis (New Mexico) | 4,788.48 mi (7,706.31 km) |
| Risca to Clute (Texas) | 4,767.15 mi (7,671.99 km) |
| Risca to Coachella (California) | 5,289.76 mi (8,513.05 km) |
| Risca to Coalinga (California) | 5,288.43 mi (8,510.90 km) |
| Risca to Coamo (Puerto Rico) | 4,105.63 mi (6,607.37 km) |
| Risca to Coatesville (Pennsylvania) | 3,443.63 mi (5,541.98 km) |
| Risca to Cockeysville (Maryland) | 3,498.98 mi (5,631.07 km) |
| Risca to Cocoa (Florida) | 4,194.86 mi (6,750.98 km) |
| Risca to Cocoa Beach (Florida) | 4,191.38 mi (6,745.38 km) |
| Risca to Coconut Creek (Florida) | 4,275.09 mi (6,880.09 km) |
| Risca to Coeur d'Alene (Idaho) | 4,538.45 mi (7,303.93 km) |
| Risca to Cohoes (New York) | 3,238.92 mi (5,212.53 km) |
| Risca to Cold Springs (Nevada) | 5,076.48 mi (8,169.81 km) |
