| Holyhead to Castelfidardo | 1,070.98 mi (1,723.57 km) |
| Holyhead to Castelfiorentino | 976.39 mi (1,571.34 km) |
| Holyhead to Castelfranco di Sopra | 994.82 mi (1,601.01 km) |
| Holyhead to Castelfranco di Sotto | 964.06 mi (1,551.50 km) |
| Holyhead to Castelfranco Emilia | 928.56 mi (1,494.38 km) |
| Holyhead to Castelfranco Veneto | 908.45 mi (1,462.00 km) |
| Holyhead to Castellabate | 1,283.78 mi (2,066.05 km) |
| Holyhead to Castellammare del Golfo | 1,345.20 mi (2,164.89 km) |
| Holyhead to Castellammare di Stabia | 1,245.83 mi (2,004.97 km) |
| Holyhead to Castellamonte | 778.20 mi (1,252.39 km) |
| Holyhead to Castellana Grotte | 1,327.86 mi (2,136.98 km) |
| Holyhead to Castellaneta | 1,332.51 mi (2,144.46 km) |
| Holyhead to Castellanza | 804.97 mi (1,295.48 km) |
| Holyhead to Castellarano | 920.88 mi (1,482.02 km) |
| Holyhead to Castelleone | 849.91 mi (1,367.79 km) |
