| Donegal to Coudekerque-Branche | 504.20 mi (811.44 km) |
| Donegal to Coueron | 583.81 mi (939.55 km) |
| Donegal to Coulommiers | 624.93 mi (1,005.72 km) |
| Donegal to Courbevoic | 594.27 mi (956.39 km) |
| Donegal to Courcouronnes | 613.50 mi (987.34 km) |
| Donegal to Cournon-d'Auvergne | 791.26 mi (1,273.40 km) |
| Donegal to Courrieres | 546.61 mi (879.69 km) |
| Donegal to Coutras | 752.29 mi (1,210.70 km) |
| Donegal to Couzeix | 732.33 mi (1,178.58 km) |
| Donegal to Cran-Gevrier | 868.41 mi (1,397.57 km) |
| Donegal to Craponne | 834.73 mi (1,343.37 km) |
| Donegal to Creil | 584.12 mi (940.05 km) |
| Donegal to Crepy-en-Valois | 598.52 mi (963.23 km) |
| Donegal to Crest | 899.73 mi (1,447.98 km) |
| Donegal to Creteil | 606.20 mi (975.59 km) |
