| Donegal to Butzbach | 760.23 mi (1,223.47 km) |
| Donegal to Buxtehude | 724.79 mi (1,166.43 km) |
| Donegal to Cadolzburg | 879.23 mi (1,414.99 km) |
| Donegal to Calbe | 840.15 mi (1,352.09 km) |
| Donegal to Calw | 826.95 mi (1,330.85 km) |
| Donegal to Castrop-Rauxel | 673.28 mi (1,083.55 km) |
| Donegal to Celle | 756.03 mi (1,216.71 km) |
| Donegal to Cham | 956.28 mi (1,538.99 km) |
| Donegal to Chemnitz | 914.29 mi (1,471.41 km) |
| Donegal to Clausthal-Zellerfeld | 785.36 mi (1,263.91 km) |
| Donegal to Cloppenburg | 670.28 mi (1,078.71 km) |
| Donegal to Coburg | 855.11 mi (1,376.17 km) |
| Donegal to Coesfeld | 656.35 mi (1,056.29 km) |
| Donegal to Cologne | 678.00 mi (1,091.14 km) |
| Donegal to Coswig | 932.22 mi (1,500.26 km) |
