| Holyhead to Culpeper (Virginia) | 3,506.24 mi (5,642.75 km) |
| Holyhead to Culver City (California) | 5,222.71 mi (8,405.14 km) |
| Holyhead to Cumberland (Maryland) | 3,481.80 mi (5,603.42 km) |
| Holyhead to Cupertino (California) | 5,147.08 mi (8,283.42 km) |
| Holyhead to Cutler Bay (Florida) | 4,239.69 mi (6,823.13 km) |
| Holyhead to Cutlerville (Michigan) | 3,603.86 mi (5,799.85 km) |
| Holyhead to Cuyahoga Falls (Ohio) | 3,521.06 mi (5,666.60 km) |
| Holyhead to Cypress (California) | 5,221.85 mi (8,403.76 km) |
| Holyhead to Cypress Gardens (Florida) | 4,169.79 mi (6,710.63 km) |
| Holyhead to Cypress Lake (Florida) | 4,254.00 mi (6,846.15 km) |
| Holyhead to D'Iberville (Mississippi) | 4,334.77 mi (6,976.14 km) |
| Holyhead to Dakota Ridge (Colorado) | 4,469.92 mi (7,193.65 km) |
| Holyhead to Dale City (Virginia) | 3,471.85 mi (5,587.40 km) |
| Holyhead to Dallas (Georgia) | 3,998.91 mi (6,435.62 km) |
| Holyhead to Dallas (Oregon) | 4,746.94 mi (7,639.46 km) |
