| Porvoo to Montemor-o-Novo | 2,094.01 mi (3,369.99 km) |
| Porvoo to Montemor-o-Velho | 2,020.95 mi (3,252.41 km) |
| Porvoo to Montijo | 2,112.31 mi (3,399.43 km) |
| Porvoo to Mortagua | 1,992.29 mi (3,206.29 km) |
| Porvoo to Moura | 2,101.68 mi (3,382.33 km) |
| Porvoo to Murtosa | 1,987.40 mi (3,198.41 km) |
| Porvoo to Nazare | 2,064.73 mi (3,322.86 km) |
| Porvoo to Nelas | 1,976.07 mi (3,180.17 km) |
| Porvoo to Obidos | 2,081.27 mi (3,349.49 km) |
| Porvoo to Odemira | 2,168.27 mi (3,489.50 km) |
| Porvoo to Odivelas | 2,114.48 mi (3,402.92 km) |
| Porvoo to Oeiras | 2,124.72 mi (3,419.41 km) |
| Porvoo to Olhao | 2,177.97 mi (3,505.11 km) |
| Porvoo to Oliveira de Azemeis | 1,976.60 mi (3,181.02 km) |
| Porvoo to Oliveira de Frades | 1,974.74 mi (3,178.04 km) |
