| Holyhead to Isny im Allgau | 750.51 mi (1,207.83 km) |
| Holyhead to Isselburg | 476.61 mi (767.03 km) |
| Holyhead to Issum | 481.10 mi (774.25 km) |
| Holyhead to Itzehoe | 580.50 mi (934.22 km) |
| Holyhead to Jena | 705.83 mi (1,135.92 km) |
| Holyhead to Jever | 515.48 mi (829.59 km) |
| Holyhead to Jork | 588.61 mi (947.27 km) |
| Holyhead to Juchen | 494.93 mi (796.52 km) |
| Holyhead to Julich | 494.03 mi (795.07 km) |
| Holyhead to Juterbog | 745.76 mi (1,200.18 km) |
| Holyhead to Kaarst | 496.60 mi (799.19 km) |
| Holyhead to Kaiserslautern | 596.71 mi (960.32 km) |
| Holyhead to Kalkar | 471.42 mi (758.67 km) |
| Holyhead to Kall | 512.48 mi (824.76 km) |
| Holyhead to Kaltenkirchen | 598.77 mi (963.62 km) |
