| Postojna to Ilawa | 590.53 mi (950.36 km) |
| Postojna to Imielin | 379.60 mi (610.91 km) |
| Postojna to Inowroclaw | 517.81 mi (833.34 km) |
| Postojna to Janow Lubelski | 508.37 mi (818.14 km) |
| Postojna to Jarocin | 452.94 mi (728.94 km) |
| Postojna to Jaroslaw | 489.14 mi (787.19 km) |
| Postojna to Jasien | 622.03 mi (1,001.06 km) |
| Postojna to Jaslo | 434.33 mi (698.99 km) |
| Postojna to Jastrzebie-Zdroj | 352.29 mi (566.96 km) |
| Postojna to Jawor | 375.58 mi (604.44 km) |
| Postojna to Jaworzno | 384.89 mi (619.43 km) |
| Postojna to Jedrzejow | 436.95 mi (703.20 km) |
| Postojna to Jelcz-Laskowice | 390.33 mi (628.17 km) |
| Postojna to Jelenia Gora | 361.07 mi (581.08 km) |
| Postojna to Jozefoslaw | 535.32 mi (861.52 km) |
