| Holyhead to Cloverly (Maryland) | 3,436.79 mi (5,530.98 km) |
| Holyhead to Clovis (California) | 5,102.55 mi (8,211.77 km) |
| Holyhead to Clovis (New Mexico) | 4,674.77 mi (7,523.31 km) |
| Holyhead to Clute (Texas) | 4,666.31 mi (7,509.70 km) |
| Holyhead to Coachella (California) | 5,166.84 mi (8,315.22 km) |
| Holyhead to Coalinga (California) | 5,161.76 mi (8,307.05 km) |
| Holyhead to Coamo (Puerto Rico) | 4,063.61 mi (6,539.75 km) |
| Holyhead to Coatesville (Pennsylvania) | 3,349.52 mi (5,390.53 km) |
| Holyhead to Cockeysville (Maryland) | 3,404.84 mi (5,479.56 km) |
| Holyhead to Cocoa (Florida) | 4,112.87 mi (6,619.03 km) |
| Holyhead to Cocoa Beach (Florida) | 4,109.66 mi (6,613.85 km) |
| Holyhead to Coconut Creek (Florida) | 4,197.00 mi (6,754.42 km) |
| Holyhead to Coeur d'Alene (Idaho) | 4,408.38 mi (7,094.60 km) |
| Holyhead to Cohoes (New York) | 3,142.18 mi (5,056.85 km) |
| Holyhead to Cold Springs (Nevada) | 4,948.44 mi (7,963.74 km) |
