| Mont-de-Marsan to Montemor-o-Novo | 539.62 mi (868.44 km) |
| Mont-de-Marsan to Montemor-o-Velho | 492.17 mi (792.07 km) |
| Mont-de-Marsan to Montijo | 564.83 mi (909.00 km) |
| Mont-de-Marsan to Mortagua | 462.21 mi (743.86 km) |
| Mont-de-Marsan to Moura | 537.65 mi (865.27 km) |
| Mont-de-Marsan to Murtosa | 469.02 mi (754.82 km) |
| Mont-de-Marsan to Nazare | 531.44 mi (855.26 km) |
| Mont-de-Marsan to Nelas | 442.28 mi (711.78 km) |
| Mont-de-Marsan to Obidos | 545.42 mi (877.77 km) |
| Mont-de-Marsan to Odemira | 608.66 mi (979.54 km) |
| Mont-de-Marsan to Odivelas | 571.21 mi (919.27 km) |
| Mont-de-Marsan to Oeiras | 581.63 mi (936.04 km) |
| Mont-de-Marsan to Olhao | 610.91 mi (983.16 km) |
| Mont-de-Marsan to Oliveira de Azemeis | 458.15 mi (737.33 km) |
| Mont-de-Marsan to Oliveira de Frades | 449.43 mi (723.28 km) |
