| Saint-Omer to Castelfiorentino | 640.30 mi (1,030.46 km) |
| Saint-Omer to Castelfranco di Sopra | 656.97 mi (1,057.29 km) |
| Saint-Omer to Castelfranco di Sotto | 628.31 mi (1,011.17 km) |
| Saint-Omer to Castelfranco Emilia | 589.11 mi (948.09 km) |
| Saint-Omer to Castelfranco Veneto | 566.36 mi (911.46 km) |
| Saint-Omer to Castellabate | 946.44 mi (1,523.16 km) |
| Saint-Omer to Castellammare del Golfo | 1,021.18 mi (1,643.44 km) |
| Saint-Omer to Castellammare di Stabia | 908.61 mi (1,462.26 km) |
| Saint-Omer to Castellamonte | 447.87 mi (720.78 km) |
| Saint-Omer to Castellana Grotte | 986.41 mi (1,587.48 km) |
| Saint-Omer to Castellaneta | 991.51 mi (1,595.68 km) |
| Saint-Omer to Castellanza | 467.87 mi (752.97 km) |
| Saint-Omer to Castellarano | 582.12 mi (936.84 km) |
| Saint-Omer to Castelleone | 511.41 mi (823.03 km) |
| Saint-Omer to Castelletto sopra Ticino | 454.49 mi (731.44 km) |
