| Walnut Creek to Montalegre | 5,549.53 mi (8,931.10 km) |
| Walnut Creek to Montemor-o-Novo | 5,683.24 mi (9,146.29 km) |
| Walnut Creek to Montemor-o-Velho | 5,593.52 mi (9,001.90 km) |
| Walnut Creek to Montijo | 5,654.73 mi (9,100.41 km) |
| Walnut Creek to Mortagua | 5,598.34 mi (9,009.65 km) |
| Walnut Creek to Moura | 5,737.93 mi (9,234.31 km) |
| Walnut Creek to Murtosa | 5,568.85 mi (8,962.20 km) |
| Walnut Creek to Nazare | 5,605.17 mi (9,020.64 km) |
| Walnut Creek to Nelas | 5,609.09 mi (9,026.96 km) |
| Walnut Creek to Obidos | 5,612.92 mi (9,033.12 km) |
| Walnut Creek to Odemira | 5,717.16 mi (9,200.88 km) |
| Walnut Creek to Odivelas | 5,638.65 mi (9,074.52 km) |
| Walnut Creek to Oeiras | 5,638.23 mi (9,073.85 km) |
| Walnut Creek to Olhao | 5,775.25 mi (9,294.37 km) |
| Walnut Creek to Oliveira de Azemeis | 5,569.91 mi (8,963.91 km) |
