| Western Springs to Montalegre | 3,960.60 mi (6,373.97 km) |
| Western Springs to Montemor-o-Novo | 4,050.93 mi (6,519.34 km) |
| Western Springs to Montemor-o-Velho | 3,976.55 mi (6,399.64 km) |
| Western Springs to Montijo | 4,018.05 mi (6,466.42 km) |
| Western Springs to Mortagua | 3,987.96 mi (6,418.00 km) |
| Western Springs to Moura | 4,104.92 mi (6,606.23 km) |
| Western Springs to Murtosa | 3,959.46 mi (6,372.14 km) |
| Western Springs to Nazare | 3,978.43 mi (6,402.66 km) |
| Western Springs to Nelas | 4,002.55 mi (6,441.49 km) |
| Western Springs to Obidos | 3,982.58 mi (6,409.35 km) |
| Western Springs to Odemira | 4,069.48 mi (6,549.19 km) |
| Western Springs to Odivelas | 4,001.31 mi (6,439.48 km) |
| Western Springs to Oeiras | 3,998.67 mi (6,435.24 km) |
| Western Springs to Olhao | 4,126.72 mi (6,641.32 km) |
| Western Springs to Oliveira de Azemeis | 3,963.04 mi (6,377.89 km) |
