| Donegal to Cognac | 707.29 mi (1,138.27 km) |
| Donegal to Cogolin | 1,026.26 mi (1,651.60 km) |
| Donegal to Colmar | 804.26 mi (1,294.34 km) |
| Donegal to Colombes | 592.96 mi (954.28 km) |
| Donegal to Colomiers | 872.45 mi (1,404.07 km) |
| Donegal to Combs-la-Ville | 615.30 mi (990.23 km) |
| Donegal to Comines | 536.67 mi (863.69 km) |
| Donegal to Compiegne | 587.96 mi (946.23 km) |
| Donegal to Concarneau | 501.97 mi (807.84 km) |
| Donegal to Conde-sur-l'Escaut | 569.95 mi (917.25 km) |
| Donegal to Conflans-Sainte-Honorine | 584.35 mi (940.42 km) |
| Donegal to Corbas | 844.24 mi (1,358.67 km) |
| Donegal to Corbeil-Essonnes | 615.65 mi (990.80 km) |
| Donegal to Cormeilles-en-Parisis | 588.87 mi (947.69 km) |
| Donegal to Cosne sur Loire | 691.56 mi (1,112.96 km) |
