| Biarritz to Montemor-o-Novo | 480.97 mi (774.04 km) |
| Biarritz to Montemor-o-Velho | 432.11 mi (695.42 km) |
| Biarritz to Montijo | 505.57 mi (813.64 km) |
| Biarritz to Mortagua | 402.15 mi (647.20 km) |
| Biarritz to Moura | 480.73 mi (773.66 km) |
| Biarritz to Murtosa | 409.04 mi (658.29 km) |
| Biarritz to Nazare | 471.48 mi (758.77 km) |
| Biarritz to Nelas | 382.24 mi (615.16 km) |
| Biarritz to Obidos | 485.55 mi (781.41 km) |
| Biarritz to Odemira | 550.91 mi (886.61 km) |
| Biarritz to Odivelas | 511.69 mi (823.49 km) |
| Biarritz to Oeiras | 522.12 mi (840.28 km) |
| Biarritz to Olhao | 555.10 mi (893.35 km) |
| Biarritz to Oliveira de Azemeis | 398.20 mi (640.83 km) |
| Biarritz to Oliveira de Frades | 389.38 mi (626.64 km) |
