| Isernia to Osecina | 331.36 mi (533.26 km) |
| Isernia to Padinska Skela | 387.83 mi (624.15 km) |
| Isernia to Pancevo | 393.23 mi (632.84 km) |
| Isernia to Paracin | 396.22 mi (637.65 km) |
| Isernia to Pecinci | 367.22 mi (590.98 km) |
| Isernia to Petrovac na Mlavi | 410.20 mi (660.16 km) |
| Isernia to Petrovaradin | 378.29 mi (608.79 km) |
| Isernia to Pirot | 438.98 mi (706.47 km) |
| Isernia to Plandiste | 426.37 mi (686.17 km) |
| Isernia to Pozarevac | 407.65 mi (656.04 km) |
| Isernia to Pozega | 332.46 mi (535.04 km) |
| Isernia to Presevo | 383.73 mi (617.55 km) |
| Isernia to Priboj | 301.62 mi (485.42 km) |
| Isernia to Prijepolje | 306.20 mi (492.77 km) |
| Isernia to Prokuplje | 391.15 mi (629.49 km) |
