| Holyhead to Clermont (Florida) | 4,144.14 mi (6,669.35 km) |
| Holyhead to Cleveland (Mississippi) | 4,239.78 mi (6,823.27 km) |
| Holyhead to Cleveland (Ohio) | 3,513.01 mi (5,653.64 km) |
| Holyhead to Cleveland (Tennessee) | 3,937.46 mi (6,336.74 km) |
| Holyhead to Cleveland Heights (Ohio) | 3,506.87 mi (5,643.77 km) |
| Holyhead to Cliffside Park (New Jersey) | 3,238.64 mi (5,212.09 km) |
| Holyhead to Clifton (Colorado) | 4,612.58 mi (7,423.22 km) |
| Holyhead to Clifton (New Jersey) | 3,243.62 mi (5,220.10 km) |
| Holyhead to Clinton (Iowa) | 3,822.15 mi (6,151.16 km) |
| Holyhead to Clinton (Maryland) | 3,449.49 mi (5,551.42 km) |
| Holyhead to Clinton (Mississippi) | 4,295.30 mi (6,912.62 km) |
| Holyhead to Clinton (Utah) | 4,620.62 mi (7,436.16 km) |
| Holyhead to Clive (Iowa) | 3,964.66 mi (6,380.51 km) |
| Holyhead to Cloquet (Minnesota) | 3,675.43 mi (5,915.03 km) |
| Holyhead to Cloverleaf (Texas) | 4,617.41 mi (7,431.00 km) |
