| Holyhead to Collegno | 789.88 mi (1,271.18 km) |
| Holyhead to Cologno al Serio | 833.69 mi (1,341.70 km) |
| Holyhead to Cologno Monzese | 822.06 mi (1,322.98 km) |
| Holyhead to Colorno | 889.01 mi (1,430.73 km) |
| Holyhead to Comacchio | 962.78 mi (1,549.45 km) |
| Holyhead to Comiso | 1,458.84 mi (2,347.78 km) |
| Holyhead to Como | 801.67 mi (1,290.16 km) |
| Holyhead to Concordia Sagittaria | 937.42 mi (1,508.63 km) |
| Holyhead to Concorezzo | 820.99 mi (1,321.25 km) |
| Holyhead to Conegliano | 911.74 mi (1,467.31 km) |
| Holyhead to Conselice | 959.43 mi (1,544.05 km) |
| Holyhead to Conselve | 926.18 mi (1,490.55 km) |
| Holyhead to Conversano | 1,321.84 mi (2,127.30 km) |
| Holyhead to Copertino | 1,390.56 mi (2,237.88 km) |
| Holyhead to Copparo | 940.84 mi (1,514.14 km) |
