| Porterville to Montalegre | 5,524.82 mi (8,891.33 km) |
| Porterville to Montemor-o-Novo | 5,649.08 mi (9,091.32 km) |
| Porterville to Montemor-o-Velho | 5,562.63 mi (8,952.18 km) |
| Porterville to Montijo | 5,619.38 mi (9,043.51 km) |
| Porterville to Mortagua | 5,569.00 mi (8,962.45 km) |
| Porterville to Moura | 5,703.84 mi (9,179.44 km) |
| Porterville to Murtosa | 5,539.61 mi (8,915.13 km) |
| Porterville to Nazare | 5,572.01 mi (8,967.28 km) |
| Porterville to Nelas | 5,580.70 mi (8,981.27 km) |
| Porterville to Obidos | 5,578.93 mi (8,978.42 km) |
| Porterville to Odemira | 5,679.32 mi (9,139.98 km) |
| Porterville to Odivelas | 5,603.06 mi (9,017.26 km) |
| Porterville to Oeiras | 5,602.09 mi (9,015.70 km) |
| Porterville to Olhao | 5,737.44 mi (9,233.51 km) |
| Porterville to Oliveira de Azemeis | 5,541.25 mi (8,917.79 km) |
