| Cities | Distance |
|---|---|
| Porsgrunn to Mo i Rana | 516.40 mi (831.07 km) |
| Porsgrunn to Molde | 264.45 mi (425.59 km) |
| Porsgrunn to Mosjoen | 477.34 mi (768.20 km) |
| Porsgrunn to Moss | 42.26 mi (68.01 km) |
| Porsgrunn to Namsos | 374.19 mi (602.21 km) |
| Porsgrunn to Nannestad | 89.30 mi (143.71 km) |
| Porsgrunn to Narvik | 684.21 mi (1,101.13 km) |
| Porsgrunn to Nedre Eiker | 46.26 mi (74.45 km) |
| Porsgrunn to Nesoddtangen | 58.26 mi (93.76 km) |
| Porsgrunn to Nittedal | 77.64 mi (124.95 km) |
| Porsgrunn to Nordre Fale | 59.77 mi (96.20 km) |
| Porsgrunn to Notodden | 39.92 mi (64.24 km) |
| Porsgrunn to Notteroy | 25.41 mi (40.90 km) |
| Porsgrunn to Oppegard | 60.22 mi (96.91 km) |
| Porsgrunn to Orsta | 245.07 mi (394.40 km) |