| Holyhead to Cicero (Illinois) | 3,728.97 mi (6,001.20 km) |
| Holyhead to Cimarron Hills (Colorado) | 4,494.72 mi (7,233.55 km) |
| Holyhead to Cincinnati (Ohio) | 3,731.70 mi (6,005.59 km) |
| Holyhead to Cinco Ranch (Texas) | 4,642.87 mi (7,471.97 km) |
| Holyhead to Circleville (Ohio) | 3,648.39 mi (5,871.51 km) |
| Holyhead to Citrus (California) | 5,199.98 mi (8,368.57 km) |
| Holyhead to Citrus Heights (California) | 5,044.94 mi (8,119.05 km) |
| Holyhead to Citrus Park (Florida) | 4,202.05 mi (6,762.55 km) |
| Holyhead to Claiborne (Louisiana) | 4,358.65 mi (7,014.57 km) |
| Holyhead to Claremont (California) | 5,193.77 mi (8,358.57 km) |
| Holyhead to Claremont (New Hampshire) | 3,061.90 mi (4,927.66 km) |
| Holyhead to Claremore (Oklahoma) | 4,296.30 mi (6,914.23 km) |
| Holyhead to Clarksburg (Maryland) | 3,442.01 mi (5,539.37 km) |
| Holyhead to Clarksburg (West Virginia) | 3,560.69 mi (5,730.38 km) |
| Holyhead to Clarksdale (Mississippi) | 4,210.83 mi (6,776.67 km) |
