| Isernia to Pontinia | 63.30 mi (101.87 km) |
| Isernia to Porcari | 240.28 mi (386.69 km) |
| Isernia to Porcia | 312.18 mi (502.40 km) |
| Isernia to Pordenone | 310.64 mi (499.92 km) |
| Isernia to Portici | 54.36 mi (87.49 km) |
| Isernia to Porto Empedocle | 300.10 mi (482.96 km) |
| Isernia to Porto Recanati | 129.75 mi (208.81 km) |
| Isernia to Porto Sant'Elpidio | 117.64 mi (189.33 km) |
| Isernia to Porto Tolle | 250.66 mi (403.41 km) |
| Isernia to Porto Torres | 307.94 mi (495.58 km) |
| Isernia to Portoferraio | 217.55 mi (350.12 km) |
| Isernia to Portogruaro | 297.25 mi (478.38 km) |
| Isernia to Portomaggiore | 246.79 mi (397.16 km) |
| Isernia to Potenza | 105.27 mi (169.42 km) |
| Isernia to Potenza Picena | 125.94 mi (202.68 km) |
