| Letterkenny to Cabestany | 974.64 mi (1,568.54 km) |
| Letterkenny to Cabries | 987.95 mi (1,589.95 km) |
| Letterkenny to Cachan | 603.29 mi (970.91 km) |
| Letterkenny to Caen | 506.15 mi (814.57 km) |
| Letterkenny to Cagnes-sur-Mer | 1,023.99 mi (1,647.96 km) |
| Letterkenny to Cahors | 831.97 mi (1,338.93 km) |
| Letterkenny to Calais | 484.76 mi (780.14 km) |
| Letterkenny to Caluire-et-Cuire | 838.51 mi (1,349.44 km) |
| Letterkenny to Cambrai | 565.35 mi (909.85 km) |
| Letterkenny to Canet-en-Roussillon | 974.52 mi (1,568.34 km) |
| Letterkenny to Cannes | 1,026.50 mi (1,651.99 km) |
| Letterkenny to Canteleu | 530.45 mi (853.68 km) |
| Letterkenny to Capbreton | 830.70 mi (1,336.89 km) |
| Letterkenny to Carcassonne | 928.68 mi (1,494.56 km) |
| Letterkenny to Carmaux | 872.41 mi (1,404.01 km) |
