| Douglas to Idar-Oberstein | 702.41 mi (1,130.42 km) |
| Douglas to Idstein | 733.10 mi (1,179.81 km) |
| Douglas to Illertissen | 856.99 mi (1,379.19 km) |
| Douglas to Illingen | 699.01 mi (1,124.95 km) |
| Douglas to Ilmenau | 838.05 mi (1,348.71 km) |
| Douglas to Ilsede | 789.03 mi (1,269.83 km) |
| Douglas to Ilsenburg | 813.27 mi (1,308.84 km) |
| Douglas to Ilsfeld | 799.81 mi (1,287.17 km) |
| Douglas to Ilvesheim | 760.92 mi (1,224.58 km) |
| Douglas to Immenstadt im Allgau | 881.82 mi (1,419.15 km) |
| Douglas to Ingelheim | 728.53 mi (1,172.45 km) |
| Douglas to Ingolstadt | 899.11 mi (1,446.97 km) |
| Douglas to Iserlohn | 690.05 mi (1,110.52 km) |
| Douglas to Isernhagen-Sud | 774.33 mi (1,246.16 km) |
| Douglas to Ismaning | 923.70 mi (1,486.54 km) |
