| Porsgrunn to Niscemi | 1,532.01 mi (2,465.53 km) |
| Porsgrunn to Nizza Monferrato | 992.49 mi (1,597.25 km) |
| Porsgrunn to Noale | 942.42 mi (1,516.68 km) |
| Porsgrunn to Nocera Inferiore | 1,286.84 mi (2,070.98 km) |
| Porsgrunn to Nocera Superiore | 1,287.69 mi (2,072.34 km) |
| Porsgrunn to Noceto | 988.16 mi (1,590.29 km) |
| Porsgrunn to Noci | 1,305.89 mi (2,101.63 km) |
| Porsgrunn to Noicattaro | 1,288.51 mi (2,073.66 km) |
| Porsgrunn to Nola | 1,273.58 mi (2,049.63 km) |
| Porsgrunn to Nonantola | 999.13 mi (1,607.94 km) |
| Porsgrunn to Noto | 1,554.87 mi (2,502.32 km) |
| Porsgrunn to Nova Milanese | 935.23 mi (1,505.11 km) |
| Porsgrunn to Novara | 945.30 mi (1,521.31 km) |
| Porsgrunn to Novate Milanese | 938.75 mi (1,510.78 km) |
| Porsgrunn to Novellara | 986.59 mi (1,587.76 km) |
