| Donegal to Carpentras | 938.60 mi (1,510.53 km) |
| Donegal to Carquefou | 583.59 mi (939.20 km) |
| Donegal to Carqueiranne | 1,022.31 mi (1,645.25 km) |
| Donegal to Carrieres-sous-Poissy | 585.03 mi (941.51 km) |
| Donegal to Carrieres-sur-Seine | 594.76 mi (957.17 km) |
| Donegal to Carros | 1,016.61 mi (1,636.07 km) |
| Donegal to Carvin | 545.57 mi (878.01 km) |
| Donegal to Castanet-Tolosan | 882.08 mi (1,419.58 km) |
| Donegal to Castelginest | 869.60 mi (1,399.48 km) |
| Donegal to Castelnau-le-Lez | 932.20 mi (1,500.23 km) |
| Donegal to Castelnaudary | 904.43 mi (1,455.54 km) |
| Donegal to Castelsarrasin | 840.96 mi (1,353.40 km) |
| Donegal to Castres | 893.86 mi (1,438.52 km) |
| Donegal to Caudebec-les-Elbeuf | 536.72 mi (863.76 km) |
| Donegal to Caudry | 576.81 mi (928.29 km) |
