| Porsgrunn to Pontedera | 1,068.42 mi (1,719.46 km) |
| Porsgrunn to Pontinia | 1,231.91 mi (1,982.57 km) |
| Porsgrunn to Porcari | 1,056.03 mi (1,699.52 km) |
| Porsgrunn to Porcia | 916.45 mi (1,474.89 km) |
| Porsgrunn to Pordenone | 917.78 mi (1,477.03 km) |
| Porsgrunn to Portici | 1,280.02 mi (2,059.99 km) |
| Porsgrunn to Porto Empedocle | 1,517.32 mi (2,441.89 km) |
| Porsgrunn to Porto Recanati | 1,096.54 mi (1,764.71 km) |
| Porsgrunn to Porto Sant'Elpidio | 1,108.44 mi (1,783.86 km) |
| Porsgrunn to Porto Tolle | 984.81 mi (1,584.90 km) |
| Porsgrunn to Porto Torres | 1,264.21 mi (2,034.56 km) |
| Porsgrunn to Portoferraio | 1,126.44 mi (1,812.83 km) |
| Porsgrunn to Portogruaro | 930.26 mi (1,497.10 km) |
| Porsgrunn to Portomaggiore | 999.87 mi (1,609.14 km) |
| Porsgrunn to Potenza | 1,304.18 mi (2,098.87 km) |
