| Letterkenny to Carpentras | 943.21 mi (1,517.95 km) |
| Letterkenny to Carquefou | 593.60 mi (955.30 km) |
| Letterkenny to Carqueiranne | 1,026.74 mi (1,652.38 km) |
| Letterkenny to Carrieres-sous-Poissy | 586.40 mi (943.72 km) |
| Letterkenny to Carrieres-sur-Seine | 595.85 mi (958.92 km) |
| Letterkenny to Carros | 1,019.18 mi (1,640.21 km) |
| Letterkenny to Carvin | 542.03 mi (872.31 km) |
| Letterkenny to Castanet-Tolosan | 891.47 mi (1,434.69 km) |
| Letterkenny to Castelginest | 878.92 mi (1,414.49 km) |
| Letterkenny to Castelnau-le-Lez | 938.56 mi (1,510.46 km) |
| Letterkenny to Castelnaudary | 913.42 mi (1,470.00 km) |
| Letterkenny to Castelsarrasin | 850.42 mi (1,368.61 km) |
| Letterkenny to Castres | 902.24 mi (1,452.01 km) |
| Letterkenny to Caudebec-les-Elbeuf | 538.97 mi (867.39 km) |
| Letterkenny to Caudry | 573.63 mi (923.16 km) |
