| Holyhead to Cedar Rapids (Iowa) | 3,869.65 mi (6,227.60 km) |
| Holyhead to Cedarburg (Wisconsin) | 3,669.74 mi (5,905.88 km) |
| Holyhead to Celebration (Florida) | 4,148.58 mi (6,676.49 km) |
| Holyhead to Celina (Ohio) | 3,667.28 mi (5,901.92 km) |
| Holyhead to Celina (Texas) | 4,495.53 mi (7,234.85 km) |
| Holyhead to Centennial (Colorado) | 4,462.07 mi (7,181.01 km) |
| Holyhead to Center Point (Alabama) | 4,085.70 mi (6,575.29 km) |
| Holyhead to Centereach (New York) | 3,200.28 mi (5,150.35 km) |
| Holyhead to Centerton (Arkansas) | 4,244.65 mi (6,831.11 km) |
| Holyhead to Centerville (Ohio) | 3,694.34 mi (5,945.47 km) |
| Holyhead to Centerville (Utah) | 4,626.22 mi (7,445.18 km) |
| Holyhead to Central (Louisiana) | 4,414.95 mi (7,105.17 km) |
| Holyhead to Central Falls (Rhode Island) | 3,087.81 mi (4,969.35 km) |
| Holyhead to Central Islip (New York) | 3,208.53 mi (5,163.63 km) |
| Holyhead to Central Point (Oregon) | 4,881.40 mi (7,855.85 km) |
