| Boulogne-sur-Mer to Casandrino | 907.38 mi (1,460.28 km) |
| Boulogne-sur-Mer to Casapulla | 901.15 mi (1,450.27 km) |
| Boulogne-sur-Mer to Casarano | 1,087.69 mi (1,750.46 km) |
| Boulogne-sur-Mer to Casatenovo | 495.77 mi (797.87 km) |
| Boulogne-sur-Mer to Casciana Terme | 652.14 mi (1,049.51 km) |
| Boulogne-sur-Mer to Cascina | 641.51 mi (1,032.42 km) |
| Boulogne-sur-Mer to Caselle Torinese | 473.89 mi (762.65 km) |
| Boulogne-sur-Mer to Caserta | 902.76 mi (1,452.85 km) |
| Boulogne-sur-Mer to Casier | 603.44 mi (971.15 km) |
| Boulogne-sur-Mer to Casorate Primo | 506.18 mi (814.62 km) |
| Boulogne-sur-Mer to Casoria | 910.79 mi (1,465.78 km) |
| Boulogne-sur-Mer to Cassano al Ionio | 1,036.96 mi (1,668.83 km) |
| Boulogne-sur-Mer to Cassano d'Adda | 510.87 mi (822.17 km) |
| Boulogne-sur-Mer to Cassano delle Murge | 994.01 mi (1,599.71 km) |
| Boulogne-sur-Mer to Cassina de' Pecchi | 506.84 mi (815.68 km) |
