| Holyhead to Camas (Washington) | 4,683.99 mi (7,538.16 km) |
| Holyhead to Cambridge (Maryland) | 3,425.43 mi (5,512.70 km) |
| Holyhead to Cambridge (Massachusetts) | 3,055.90 mi (4,918.00 km) |
| Holyhead to Camden (Arkansas) | 4,331.10 mi (6,970.24 km) |
| Holyhead to Camden (New Jersey) | 3,323.19 mi (5,348.16 km) |
| Holyhead to Cameron Park (California) | 5,037.07 mi (8,106.39 km) |
| Holyhead to Camp Pendleton South (California) | 5,234.00 mi (8,423.30 km) |
| Holyhead to Camp Springs (Maryland) | 3,447.48 mi (5,548.19 km) |
| Holyhead to Camp Verde (Arizona) | 4,973.54 mi (8,004.14 km) |
| Holyhead to Campbell (California) | 5,146.38 mi (8,282.31 km) |
| Holyhead to Campbellsville (Kentucky) | 3,850.85 mi (6,197.35 km) |
| Holyhead to Campton Hills (Illinois) | 3,748.79 mi (6,033.09 km) |
| Holyhead to Canby (Oregon) | 4,710.11 mi (7,580.20 km) |
| Holyhead to Candelaria (Puerto Rico) | 4,039.86 mi (6,501.53 km) |
| Holyhead to Candler-McAfee (Georgia) | 3,985.55 mi (6,414.12 km) |
