| Gravelines to Cologno al Serio | 509.95 mi (820.69 km) |
| Gravelines to Cologno Monzese | 499.94 mi (804.57 km) |
| Gravelines to Colorno | 565.73 mi (910.45 km) |
| Gravelines to Comacchio | 636.23 mi (1,023.91 km) |
| Gravelines to Comiso | 1,147.69 mi (1,847.03 km) |
| Gravelines to Como | 478.96 mi (770.81 km) |
| Gravelines to Concordia Sagittaria | 609.12 mi (980.28 km) |
| Gravelines to Concorezzo | 498.39 mi (802.08 km) |
| Gravelines to Conegliano | 583.50 mi (939.05 km) |
| Gravelines to Conselice | 633.91 mi (1,020.18 km) |
| Gravelines to Conselve | 599.01 mi (964.01 km) |
| Gravelines to Conversano | 995.08 mi (1,601.43 km) |
| Gravelines to Copertino | 1,063.67 mi (1,711.81 km) |
| Gravelines to Copparo | 614.40 mi (988.78 km) |
| Gravelines to Corato | 961.18 mi (1,546.87 km) |
