| Portici to Isny im Allgau | 520.15 mi (837.10 km) |
| Portici to Isselburg | 847.48 mi (1,363.88 km) |
| Portici to Issum | 830.72 mi (1,336.91 km) |
| Portici to Itzehoe | 932.66 mi (1,500.96 km) |
| Portici to Jena | 710.69 mi (1,143.74 km) |
| Portici to Jever | 930.75 mi (1,497.89 km) |
| Portici to Jork | 904.85 mi (1,456.21 km) |
| Portici to Juchen | 802.93 mi (1,292.19 km) |
| Portici to Julich | 795.60 mi (1,280.40 km) |
| Portici to Juterbog | 774.35 mi (1,246.20 km) |
| Portici to Kaarst | 807.28 mi (1,299.19 km) |
| Portici to Kaiserslautern | 675.96 mi (1,087.85 km) |
| Portici to Kalkar | 845.50 mi (1,360.69 km) |
| Portici to Kall | 769.33 mi (1,238.12 km) |
| Portici to Kaltenkirchen | 922.24 mi (1,484.20 km) |
