| Holyhead to Carlsbad (New Mexico) | 4,821.89 mi (7,760.08 km) |
| Holyhead to Carmel (Indiana) | 3,756.15 mi (6,044.93 km) |
| Holyhead to Carmichael (California) | 5,049.71 mi (8,126.72 km) |
| Holyhead to Carney (Maryland) | 3,404.05 mi (5,478.29 km) |
| Holyhead to Carnot-Moon (Pennsylvania) | 3,499.62 mi (5,632.10 km) |
| Holyhead to Carol Stream (Illinois) | 3,739.52 mi (6,018.17 km) |
| Holyhead to Carolina (Puerto Rico) | 4,030.17 mi (6,485.93 km) |
| Holyhead to Carolina Forest (South Carolina) | 3,767.79 mi (6,063.68 km) |
| Holyhead to Carpentersville (Illinois) | 3,735.88 mi (6,012.32 km) |
| Holyhead to Carpinteria (California) | 5,236.20 mi (8,426.85 km) |
| Holyhead to Carrboro (North Carolina) | 3,670.16 mi (5,906.55 km) |
| Holyhead to Carroll (Iowa) | 3,981.36 mi (6,407.38 km) |
| Holyhead to Carrollton (Georgia) | 4,025.15 mi (6,477.86 km) |
| Holyhead to Carrollton (Texas) | 4,516.54 mi (7,268.67 km) |
| Holyhead to Carrollwood (Florida) | 4,200.88 mi (6,760.66 km) |
