| Holyhead to Corinth (Mississippi) | 4,092.67 mi (6,586.52 km) |
| Holyhead to Corinth (Texas) | 4,514.90 mi (7,266.03 km) |
| Holyhead to Cornelius (North Carolina) | 3,764.11 mi (6,057.76 km) |
| Holyhead to Cornelius (Oregon) | 4,705.71 mi (7,573.11 km) |
| Holyhead to Corning (New York) | 3,301.90 mi (5,313.90 km) |
| Holyhead to Corona (California) | 5,203.89 mi (8,374.86 km) |
| Holyhead to Coronado (California) | 5,258.62 mi (8,462.93 km) |
| Holyhead to Corpus Christi (Texas) | 4,812.41 mi (7,744.82 km) |
| Holyhead to Corsicana (Texas) | 4,547.28 mi (7,318.14 km) |
| Holyhead to Cortland (New York) | 3,247.40 mi (5,226.19 km) |
| Holyhead to Corvallis (Oregon) | 4,766.10 mi (7,670.30 km) |
| Holyhead to Coshocton (Ohio) | 3,575.39 mi (5,754.03 km) |
| Holyhead to Costa Mesa (California) | 5,226.35 mi (8,410.99 km) |
| Holyhead to Coto de Caza (California) | 5,219.69 mi (8,400.27 km) |
| Holyhead to Cottage Grove (Minnesota) | 3,779.68 mi (6,082.81 km) |
