| Letterkenny to Butzbach | 751.38 mi (1,209.22 km) |
| Letterkenny to Buxtehude | 709.31 mi (1,141.53 km) |
| Letterkenny to Cadolzburg | 870.62 mi (1,401.12 km) |
| Letterkenny to Calbe | 826.83 mi (1,330.65 km) |
| Letterkenny to Calw | 821.20 mi (1,321.59 km) |
| Letterkenny to Castrop-Rauxel | 663.04 mi (1,067.05 km) |
| Letterkenny to Celle | 742.08 mi (1,194.26 km) |
| Letterkenny to Cham | 946.89 mi (1,523.87 km) |
| Letterkenny to Chemnitz | 902.23 mi (1,452.00 km) |
| Letterkenny to Clausthal-Zellerfeld | 772.87 mi (1,243.81 km) |
| Letterkenny to Cloppenburg | 656.72 mi (1,056.88 km) |
| Letterkenny to Coburg | 845.05 mi (1,359.98 km) |
| Letterkenny to Coesfeld | 645.29 mi (1,038.49 km) |
| Letterkenny to Cologne | 669.39 mi (1,077.27 km) |
| Letterkenny to Coswig | 919.38 mi (1,479.59 km) |
