| Gravelines to Castelli Calepio | 513.64 mi (826.62 km) |
| Gravelines to Castelnovo ne' Monti | 593.33 mi (954.87 km) |
| Gravelines to Castelnuovo Berardenga | 686.34 mi (1,104.56 km) |
| Gravelines to Castelnuovo di Porto | 783.93 mi (1,261.61 km) |
| Gravelines to Castelnuovo di Verona | 551.99 mi (888.33 km) |
| Gravelines to Castelnuovo Rangone | 603.33 mi (970.96 km) |
| Gravelines to Castelvetrano | 1,057.09 mi (1,701.23 km) |
| Gravelines to Castelvetro di Modena | 606.52 mi (976.10 km) |
| Gravelines to Castenaso | 622.50 mi (1,001.81 km) |
| Gravelines to Castenedolo | 534.77 mi (860.63 km) |
| Gravelines to Castiglion Fiorentino | 699.08 mi (1,125.05 km) |
| Gravelines to Castiglione del Lago | 714.29 mi (1,149.53 km) |
| Gravelines to Castiglione delle Stiviere | 544.96 mi (877.03 km) |
| Gravelines to Castrolibero | 1,054.78 mi (1,697.50 km) |
| Gravelines to Castrovillari | 1,026.86 mi (1,652.57 km) |
