| Porsgrunn to Karditsa | 1,466.02 mi (2,359.33 km) |
| Porsgrunn to Kastoria | 1,379.89 mi (2,220.71 km) |
| Porsgrunn to Katerini | 1,416.60 mi (2,279.80 km) |
| Porsgrunn to Keratsini | 1,586.31 mi (2,552.92 km) |
| Porsgrunn to Kerkyra | 1,419.18 mi (2,283.95 km) |
| Porsgrunn to Kiato | 1,568.90 mi (2,524.89 km) |
| Porsgrunn to Kifisia | 1,582.15 mi (2,546.22 km) |
| Porsgrunn to Kilkis | 1,376.34 mi (2,215.01 km) |
| Porsgrunn to Komotini | 1,418.03 mi (2,282.10 km) |
| Porsgrunn to Korinthos | 1,576.53 mi (2,537.19 km) |
| Porsgrunn to Koropi | 1,595.13 mi (2,567.12 km) |
| Porsgrunn to Korydallos | 1,585.80 mi (2,552.10 km) |
| Porsgrunn to Kos | 1,726.69 mi (2,778.84 km) |
| Porsgrunn to Kozani | 1,402.44 mi (2,257.01 km) |
| Porsgrunn to Lagos | 1,412.14 mi (2,272.63 km) |
