| Porsgrunn to Bombarral | 1,601.79 mi (2,577.84 km) |
| Porsgrunn to Bougado | 1,459.37 mi (2,348.63 km) |
| Porsgrunn to Braga | 1,442.97 mi (2,322.23 km) |
| Porsgrunn to Braganca | 1,389.66 mi (2,236.45 km) |
| Porsgrunn to Cabeceiras de Basto | 1,434.75 mi (2,309.01 km) |
| Porsgrunn to Cacem | 1,636.45 mi (2,633.62 km) |
| Porsgrunn to Cadaval | 1,602.73 mi (2,579.34 km) |
| Porsgrunn to Caldas da Rainha | 1,592.64 mi (2,563.11 km) |
| Porsgrunn to Calheta | 2,202.75 mi (3,544.99 km) |
| Porsgrunn to Camara de Lobos | 2,199.86 mi (3,540.34 km) |
| Porsgrunn to Canico | 2,199.99 mi (3,540.54 km) |
| Porsgrunn to Cantanhede | 1,521.71 mi (2,448.96 km) |
| Porsgrunn to Carregal do Sal | 1,502.96 mi (2,418.78 km) |
| Porsgrunn to Cartaxo | 1,600.89 mi (2,576.38 km) |
| Porsgrunn to Cascais | 1,643.31 mi (2,644.66 km) |
