| Holyhead to Clarkston (Georgia) | 3,980.05 mi (6,405.27 km) |
| Holyhead to Clarksville (Indiana) | 3,819.95 mi (6,147.62 km) |
| Holyhead to Clarksville (Tennessee) | 3,966.50 mi (6,383.47 km) |
| Holyhead to Clawson (Michigan) | 3,521.53 mi (5,667.36 km) |
| Holyhead to Clay (Alabama) | 4,080.15 mi (6,566.37 km) |
| Holyhead to Clayton (California) | 5,107.62 mi (8,219.92 km) |
| Holyhead to Clayton (Missouri) | 3,980.05 mi (6,405.27 km) |
| Holyhead to Clayton (North Carolina) | 3,657.25 mi (5,885.77 km) |
| Holyhead to Clayton (Ohio) | 3,690.44 mi (5,939.18 km) |
| Holyhead to Clearfield (Utah) | 4,621.25 mi (7,437.18 km) |
| Holyhead to Clearlake (California) | 5,069.90 mi (8,159.22 km) |
| Holyhead to Clearwater (Florida) | 4,215.02 mi (6,783.41 km) |
| Holyhead to Cleburne (Texas) | 4,569.18 mi (7,353.38 km) |
| Holyhead to Clemmons (North Carolina) | 3,717.24 mi (5,982.32 km) |
| Holyhead to Clemson (South Carolina) | 3,879.94 mi (6,244.15 km) |
