| Porsgrunn to Kobarid | 903.44 mi (1,453.94 km) |
| Porsgrunn to Kobilje | 901.93 mi (1,451.52 km) |
| Porsgrunn to Kocevje | 955.17 mi (1,537.19 km) |
| Porsgrunn to Komen | 934.10 mi (1,503.29 km) |
| Porsgrunn to Komenda | 913.95 mi (1,470.87 km) |
| Porsgrunn to Koper | 952.13 mi (1,532.30 km) |
| Porsgrunn to Kostanjevica na Krki | 946.98 mi (1,524.02 km) |
| Porsgrunn to Kostel | 964.74 mi (1,552.59 km) |
| Porsgrunn to Kozje | 933.05 mi (1,501.60 km) |
| Porsgrunn to Kranj | 910.66 mi (1,465.56 km) |
| Porsgrunn to Kranjska Gora | 888.71 mi (1,430.24 km) |
| Porsgrunn to Krizevci | 906.85 mi (1,459.43 km) |
| Porsgrunn to Krsko | 940.60 mi (1,513.75 km) |
| Porsgrunn to Kuzma | 888.11 mi (1,429.27 km) |
| Porsgrunn to Lasko | 924.15 mi (1,487.27 km) |
