| Letterkenny to Creutzwald | 727.67 mi (1,171.07 km) |
| Letterkenny to Croissy-sur-Seine | 593.14 mi (954.57 km) |
| Letterkenny to Croix | 540.80 mi (870.34 km) |
| Letterkenny to Crosne | 611.18 mi (983.61 km) |
| Letterkenny to Cuers | 1,018.35 mi (1,638.88 km) |
| Letterkenny to Cugnaux | 886.90 mi (1,427.33 km) |
| Letterkenny to Cusset | 780.60 mi (1,256.25 km) |
| Letterkenny to Dammarie-le-Lys | 626.82 mi (1,008.77 km) |
| Letterkenny to Dammartin-en-Goele | 600.57 mi (966.53 km) |
| Letterkenny to Dardilly | 835.24 mi (1,344.19 km) |
| Letterkenny to Darnetal | 534.17 mi (859.67 km) |
| Letterkenny to Dax | 832.17 mi (1,339.24 km) |
| Letterkenny to Decines-Charpieu | 843.16 mi (1,356.94 km) |
| Letterkenny to Denain | 564.14 mi (907.90 km) |
| Letterkenny to Deuil-la-Barre | 593.62 mi (955.34 km) |
