| Holyhead to Caño Martin Peña (Puerto Rico) | 4,031.67 mi (6,488.35 km) |
| Holyhead to Cañon City (Colorado) | 4,534.85 mi (7,298.14 km) |
| Holyhead to Canóvanas (Puerto Rico) | 4,028.97 mi (6,484.00 km) |
| Holyhead to Canton (Georgia) | 3,968.45 mi (6,386.60 km) |
| Holyhead to Canton (Illinois) | 3,875.94 mi (6,237.72 km) |
| Holyhead to Canton (Mississippi) | 4,270.75 mi (6,873.11 km) |
| Holyhead to Canton (Ohio) | 3,531.42 mi (5,683.27 km) |
| Holyhead to Canyon (Texas) | 4,599.01 mi (7,401.38 km) |
| Holyhead to Canyon Lake (California) | 5,203.82 mi (8,374.74 km) |
| Holyhead to Canyon Lake (Texas) | 4,732.27 mi (7,615.85 km) |
| Holyhead to Cape Coral (Florida) | 4,252.49 mi (6,843.72 km) |
| Holyhead to Cape Girardeau (Missouri) | 4,016.04 mi (6,463.19 km) |
| Holyhead to Carbondale (Illinois) | 3,982.89 mi (6,409.84 km) |
| Holyhead to Carlisle (Pennsylvania) | 3,394.94 mi (5,463.64 km) |
| Holyhead to Carlsbad (California) | 5,236.55 mi (8,427.41 km) |
