| Porsgrunn to Jicin | 639.86 mi (1,029.76 km) |
| Porsgrunn to Jihlava | 711.32 mi (1,144.75 km) |
| Porsgrunn to Jindrichuv Hradec | 720.96 mi (1,160.27 km) |
| Porsgrunn to Jirkov | 613.37 mi (987.12 km) |
| Porsgrunn to Kadan | 620.10 mi (997.95 km) |
| Porsgrunn to Karlovy Vary | 626.58 mi (1,008.39 km) |
| Porsgrunn to Karvina | 730.14 mi (1,175.05 km) |
| Porsgrunn to Kladno | 643.51 mi (1,035.63 km) |
| Porsgrunn to Klasterec nad Ohri | 618.63 mi (995.59 km) |
| Porsgrunn to Klatovy | 686.75 mi (1,105.21 km) |
| Porsgrunn to Kolin | 664.73 mi (1,069.79 km) |
| Porsgrunn to Koprivnice | 738.70 mi (1,188.83 km) |
| Porsgrunn to Kralupy nad Vltavou | 639.75 mi (1,029.58 km) |
| Porsgrunn to Kraluv Dvur | 656.25 mi (1,056.13 km) |
| Porsgrunn to Krnov | 699.62 mi (1,125.94 km) |
