| Porsgrunn to Castelo Branco | 1,530.89 mi (2,463.73 km) |
| Porsgrunn to Castro Daire | 1,472.28 mi (2,369.40 km) |
| Porsgrunn to Celorico de Basto | 1,443.68 mi (2,323.38 km) |
| Porsgrunn to Chamusca | 1,581.67 mi (2,545.46 km) |
| Porsgrunn to Chaves | 1,409.54 mi (2,268.44 km) |
| Porsgrunn to Cinfaes | 1,464.32 mi (2,356.59 km) |
| Porsgrunn to Coimbra | 1,526.43 mi (2,456.56 km) |
| Porsgrunn to Condeixa-a-Nova | 1,533.93 mi (2,468.62 km) |
| Porsgrunn to Corroios | 1,642.73 mi (2,643.73 km) |
| Porsgrunn to Coruche | 1,607.41 mi (2,586.88 km) |
| Porsgrunn to Costa de Caparica | 1,642.74 mi (2,643.73 km) |
| Porsgrunn to Covilha | 1,501.44 mi (2,416.33 km) |
| Porsgrunn to Eiras | 1,524.38 mi (2,453.25 km) |
| Porsgrunn to Elvas | 1,583.93 mi (2,549.09 km) |
| Porsgrunn to Entroncamento | 1,574.08 mi (2,533.24 km) |
