| Isernia to Montemor-o-Novo | 1,200.26 mi (1,931.62 km) |
| Isernia to Montemor-o-Velho | 1,197.98 mi (1,927.96 km) |
| Isernia to Montijo | 1,234.87 mi (1,987.33 km) |
| Isernia to Mortagua | 1,171.01 mi (1,884.55 km) |
| Isernia to Moura | 1,171.62 mi (1,885.53 km) |
| Isernia to Murtosa | 1,187.71 mi (1,911.43 km) |
| Isernia to Nazare | 1,226.67 mi (1,974.14 km) |
| Isernia to Nelas | 1,150.13 mi (1,850.95 km) |
| Isernia to Obidos | 1,235.53 mi (1,988.39 km) |
| Isernia to Odemira | 1,245.11 mi (2,003.81 km) |
| Isernia to Odivelas | 1,247.20 mi (2,007.18 km) |
| Isernia to Oeiras | 1,256.39 mi (2,021.97 km) |
| Isernia to Olhao | 1,218.20 mi (1,960.51 km) |
| Isernia to Oliveira de Azemeis | 1,178.25 mi (1,896.20 km) |
| Isernia to Oliveira de Frades | 1,164.74 mi (1,874.47 km) |
