| Mercer Island to Montalegre | 5,077.92 mi (8,172.13 km) |
| Mercer Island to Montemor-o-Novo | 5,232.40 mi (8,420.73 km) |
| Mercer Island to Montemor-o-Velho | 5,135.88 mi (8,265.41 km) |
| Mercer Island to Montijo | 5,207.10 mi (8,380.02 km) |
| Mercer Island to Mortagua | 5,136.96 mi (8,267.13 km) |
| Mercer Island to Moura | 5,286.32 mi (8,507.50 km) |
| Mercer Island to Murtosa | 5,107.59 mi (8,219.87 km) |
| Mercer Island to Nazare | 5,152.80 mi (8,292.63 km) |
| Mercer Island to Nelas | 5,145.40 mi (8,280.72 km) |
| Mercer Island to Obidos | 5,162.47 mi (8,308.19 km) |
| Mercer Island to Odemira | 5,274.86 mi (8,489.07 km) |
| Mercer Island to Odivelas | 5,191.76 mi (8,355.33 km) |
| Mercer Island to Oeiras | 5,192.68 mi (8,356.81 km) |
| Mercer Island to Olhao | 5,332.23 mi (8,581.40 km) |
| Mercer Island to Oliveira de Azemeis | 5,107.27 mi (8,219.36 km) |
