| Isabela to Montalegre | 3,802.34 mi (6,119.27 km) |
| Isabela to Montemor-o-Novo | 3,760.39 mi (6,051.77 km) |
| Isabela to Montemor-o-Velho | 3,744.45 mi (6,026.11 km) |
| Isabela to Montijo | 3,723.81 mi (5,992.90 km) |
| Isabela to Mortagua | 3,769.82 mi (6,066.94 km) |
| Isabela to Moura | 3,799.51 mi (6,114.71 km) |
| Isabela to Murtosa | 3,750.99 mi (6,036.63 km) |
| Isabela to Nazare | 3,720.47 mi (5,987.51 km) |
| Isabela to Nelas | 3,790.41 mi (6,100.08 km) |
| Isabela to Obidos | 3,714.07 mi (5,977.22 km) |
| Isabela to Odemira | 3,732.77 mi (6,007.31 km) |
| Isabela to Odivelas | 3,709.41 mi (5,969.72 km) |
| Isabela to Oeiras | 3,701.42 mi (5,956.86 km) |
| Isabela to Olhao | 3,774.09 mi (6,073.81 km) |
| Isabela to Oliveira de Azemeis | 3,759.98 mi (6,051.11 km) |
