| Porsgrunn to Penne | 1,165.48 mi (1,875.67 km) |
| Porsgrunn to Pergine Valsugana | 903.80 mi (1,454.52 km) |
| Porsgrunn to Perugia | 1,111.59 mi (1,788.94 km) |
| Porsgrunn to Pesaro | 1,058.76 mi (1,703.91 km) |
| Porsgrunn to Pescantina | 943.13 mi (1,517.82 km) |
| Porsgrunn to Pescara | 1,166.54 mi (1,877.37 km) |
| Porsgrunn to Peschiera del Garda | 945.87 mi (1,522.23 km) |
| Porsgrunn to Pescia | 1,051.99 mi (1,693.02 km) |
| Porsgrunn to Petilia Policastro | 1,416.46 mi (2,279.57 km) |
| Porsgrunn to Piacenza | 971.84 mi (1,564.02 km) |
| Porsgrunn to Pianella | 1,169.80 mi (1,882.62 km) |
| Porsgrunn to Pianezza | 972.21 mi (1,564.62 km) |
| Porsgrunn to Pianiga | 948.47 mi (1,526.42 km) |
| Porsgrunn to Piano di Sorrento | 1,293.27 mi (2,081.31 km) |
| Porsgrunn to Pianoro | 1,020.19 mi (1,641.84 km) |
