| Harnes to Cognac | 360.44 mi (580.08 km) |
| Harnes to Cogolin | 525.47 mi (845.66 km) |
| Harnes to Colmar | 258.61 mi (416.19 km) |
| Harnes to Colombes | 109.10 mi (175.58 km) |
| Harnes to Colomiers | 477.70 mi (768.79 km) |
| Harnes to Combs-la-Ville | 123.62 mi (198.94 km) |
| Harnes to Comines | 22.29 mi (35.88 km) |
| Harnes to Compiegne | 71.27 mi (114.69 km) |
| Harnes to Concarneau | 355.62 mi (572.32 km) |
| Harnes to Conde-sur-l'Escaut | 30.13 mi (48.49 km) |
| Harnes to Conflans-Sainte-Honorine | 106.21 mi (170.92 km) |
| Harnes to Corbas | 342.65 mi (551.44 km) |
| Harnes to Corbeil-Essonnes | 127.94 mi (205.89 km) |
| Harnes to Cormeilles-en-Parisis | 106.40 mi (171.24 km) |
| Harnes to Cosne sur Loire | 209.68 mi (337.45 km) |
