| Postojna to Kidricevo | 87.52 mi (140.85 km) |
| Postojna to Kobarid | 44.58 mi (71.74 km) |
| Postojna to Kobilje | 121.68 mi (195.82 km) |
| Postojna to Kocevje | 32.48 mi (52.27 km) |
| Postojna to Komen | 22.47 mi (36.17 km) |
| Postojna to Komenda | 33.65 mi (54.15 km) |
| Postojna to Koper | 27.96 mi (45.00 km) |
| Postojna to Kostanjevica na Krki | 58.53 mi (94.20 km) |
| Postojna to Kostel | 38.37 mi (61.74 km) |
| Postojna to Kozje | 67.86 mi (109.21 km) |
| Postojna to Kranj | 32.45 mi (52.22 km) |
| Postojna to Kranjska Gora | 53.11 mi (85.47 km) |
| Postojna to Krizevci | 107.01 mi (172.22 km) |
| Postojna to Krsko | 62.26 mi (100.20 km) |
| Postojna to Kuzma | 115.32 mi (185.60 km) |
