| Donegal to Corbetta | 982.05 mi (1,580.45 km) |
| Donegal to Corciano | 1,213.41 mi (1,952.79 km) |
| Donegal to Cordenons | 1,089.80 mi (1,753.86 km) |
| Donegal to Cori | 1,312.30 mi (2,111.94 km) |
| Donegal to Coriano | 1,182.10 mi (1,902.40 km) |
| Donegal to Corigliano Calabro | 1,541.54 mi (2,480.87 km) |
| Donegal to Corleone | 1,536.77 mi (2,473.19 km) |
| Donegal to Cormano | 986.29 mi (1,587.29 km) |
| Donegal to Cornaredo | 984.29 mi (1,584.06 km) |
| Donegal to Cornate d'Adda | 991.53 mi (1,595.71 km) |
| Donegal to Cornedo Vicentino | 1,058.43 mi (1,703.37 km) |
| Donegal to Correggio | 1,079.76 mi (1,737.70 km) |
| Donegal to Corridonia | 1,249.58 mi (2,011.01 km) |
| Donegal to Corsico | 990.41 mi (1,593.92 km) |
| Donegal to Cortona | 1,196.16 mi (1,925.03 km) |
