| Harnes to Coudekerque-Branche | 45.97 mi (73.98 km) |
| Harnes to Coueron | 306.65 mi (493.51 km) |
| Harnes to Coulommiers | 112.86 mi (181.63 km) |
| Harnes to Courbevoic | 110.81 mi (178.34 km) |
| Harnes to Courcouronnes | 127.63 mi (205.39 km) |
| Harnes to Cournon-d'Auvergne | 325.21 mi (523.37 km) |
| Harnes to Courrieres | 2.03 mi (3.27 km) |
| Harnes to Coutras | 399.04 mi (642.19 km) |
| Harnes to Couzeix | 324.87 mi (522.83 km) |
| Harnes to Cran-Gevrier | 346.58 mi (557.76 km) |
| Harnes to Craponne | 335.35 mi (539.69 km) |
| Harnes to Creil | 84.13 mi (135.39 km) |
| Harnes to Crepy-en-Valois | 83.65 mi (134.62 km) |
| Harnes to Crest | 407.07 mi (655.11 km) |
| Harnes to Creteil | 115.98 mi (186.65 km) |
