| Porsgrunn to Naron | 1,314.27 mi (2,115.12 km) |
| Porsgrunn to Navalcarnero | 1,431.88 mi (2,304.39 km) |
| Porsgrunn to Navalmoral de la Mata | 1,485.59 mi (2,390.83 km) |
| Porsgrunn to Nerja | 1,661.21 mi (2,673.46 km) |
| Porsgrunn to Nigran | 1,415.68 mi (2,278.31 km) |
| Porsgrunn to Nijar | 1,620.53 mi (2,607.99 km) |
| Porsgrunn to Novelda | 1,505.60 mi (2,423.02 km) |
| Porsgrunn to Noya | 1,378.49 mi (2,218.47 km) |
| Porsgrunn to Nules | 1,399.13 mi (2,251.68 km) |
| Porsgrunn to Ocana | 1,444.02 mi (2,323.93 km) |
| Porsgrunn to Ogijares | 1,632.25 mi (2,626.85 km) |
| Porsgrunn to Oleiros | 1,331.42 mi (2,142.71 km) |
| Porsgrunn to Olesa de Montserrat | 1,259.97 mi (2,027.72 km) |
| Porsgrunn to Oliva | 1,461.19 mi (2,351.56 km) |
| Porsgrunn to Olivares | 1,657.51 mi (2,667.51 km) |
