| Holyhead to Idar-Oberstein | 569.73 mi (916.90 km) |
| Holyhead to Idstein | 590.71 mi (950.65 km) |
| Holyhead to Illertissen | 731.15 mi (1,176.68 km) |
| Holyhead to Illingen | 571.92 mi (920.41 km) |
| Holyhead to Ilmenau | 684.48 mi (1,101.57 km) |
| Holyhead to Ilsede | 622.14 mi (1,001.23 km) |
| Holyhead to Ilsenburg | 649.31 mi (1,044.97 km) |
| Holyhead to Ilsfeld | 667.96 mi (1,074.97 km) |
| Holyhead to Ilvesheim | 626.59 mi (1,008.40 km) |
| Holyhead to Immenstadt im Allgau | 762.30 mi (1,226.81 km) |
| Holyhead to Ingelheim | 589.81 mi (949.21 km) |
| Holyhead to Ingolstadt | 762.93 mi (1,227.82 km) |
| Holyhead to Iserlohn | 535.18 mi (861.29 km) |
| Holyhead to Isernhagen-Sud | 606.27 mi (975.70 km) |
| Holyhead to Ismaning | 791.92 mi (1,274.48 km) |
