| Postojna to Isny im Allgau | 237.86 mi (382.79 km) |
| Postojna to Isselburg | 546.59 mi (879.65 km) |
| Postojna to Issum | 533.23 mi (858.15 km) |
| Postojna to Itzehoe | 600.35 mi (966.16 km) |
| Postojna to Jena | 375.75 mi (604.71 km) |
| Postojna to Jever | 607.72 mi (978.03 km) |
| Postojna to Jork | 572.82 mi (921.86 km) |
| Postojna to Juchen | 509.71 mi (820.30 km) |
| Postojna to Julich | 505.98 mi (814.29 km) |
| Postojna to Juterbog | 432.68 mi (696.33 km) |
| Postojna to Kaarst | 511.63 mi (823.39 km) |
| Postojna to Kaiserslautern | 392.66 mi (631.93 km) |
| Postojna to Kalkar | 547.02 mi (880.35 km) |
| Postojna to Kall | 482.81 mi (777.00 km) |
| Postojna to Kaltenkirchen | 588.28 mi (946.74 km) |
