| Tortona to Montemor-o-Novo | 977.66 mi (1,573.38 km) |
| Tortona to Montemor-o-Velho | 949.01 mi (1,527.28 km) |
| Tortona to Montijo | 1,007.97 mi (1,622.17 km) |
| Tortona to Mortagua | 919.67 mi (1,480.06 km) |
| Tortona to Moura | 962.21 mi (1,548.53 km) |
| Tortona to Murtosa | 930.17 mi (1,496.96 km) |
| Tortona to Nazare | 984.79 mi (1,584.87 km) |
| Tortona to Nelas | 898.99 mi (1,446.78 km) |
| Tortona to Obidos | 996.93 mi (1,604.41 km) |
| Tortona to Odemira | 1,036.94 mi (1,668.79 km) |
| Tortona to Odivelas | 1,017.19 mi (1,637.00 km) |
| Tortona to Oeiras | 1,027.29 mi (1,653.27 km) |
| Tortona to Olhao | 1,024.30 mi (1,648.45 km) |
| Tortona to Oliveira de Azemeis | 919.63 mi (1,480.00 km) |
| Tortona to Oliveira de Frades | 909.11 mi (1,463.06 km) |
