| Donegal to Idar-Oberstein | 735.08 mi (1,183.00 km) |
| Donegal to Idstein | 752.74 mi (1,211.42 km) |
| Donegal to Illertissen | 897.25 mi (1,443.98 km) |
| Donegal to Illingen | 738.54 mi (1,188.57 km) |
| Donegal to Ilmenau | 840.06 mi (1,351.95 km) |
| Donegal to Ilsede | 768.03 mi (1,236.02 km) |
| Donegal to Ilsenburg | 797.60 mi (1,283.61 km) |
| Donegal to Ilsfeld | 832.88 mi (1,340.39 km) |
| Donegal to Ilvesheim | 791.08 mi (1,273.11 km) |
| Donegal to Immenstadt im Allgau | 929.52 mi (1,495.91 km) |
| Donegal to Ingelheim | 753.20 mi (1,212.16 km) |
| Donegal to Ingolstadt | 925.98 mi (1,490.22 km) |
| Donegal to Iserlohn | 691.80 mi (1,113.34 km) |
| Donegal to Isernhagen-Sud | 751.22 mi (1,208.96 km) |
| Donegal to Ismaning | 956.22 mi (1,538.89 km) |
