| Duluth to Montalegre | 3,978.15 mi (6,402.22 km) |
| Duluth to Montemor-o-Novo | 4,091.77 mi (6,585.06 km) |
| Duluth to Montemor-o-Velho | 4,008.67 mi (6,451.32 km) |
| Duluth to Montijo | 4,061.10 mi (6,535.71 km) |
| Duluth to Mortagua | 4,016.68 mi (6,464.22 km) |
| Duluth to Moura | 4,146.45 mi (6,673.07 km) |
| Duluth to Murtosa | 3,987.47 mi (6,417.22 km) |
| Duluth to Nazare | 4,015.80 mi (6,462.80 km) |
| Duluth to Nelas | 4,029.38 mi (6,484.65 km) |
| Duluth to Obidos | 4,021.93 mi (6,472.68 km) |
| Duluth to Odemira | 4,118.98 mi (6,628.85 km) |
| Duluth to Odivelas | 4,044.62 mi (6,509.19 km) |
| Duluth to Oeiras | 4,043.21 mi (6,506.92 km) |
| Duluth to Olhao | 4,177.01 mi (6,722.24 km) |
| Duluth to Oliveira de Azemeis | 3,989.77 mi (6,420.91 km) |
