| Ashburn to Montalegre | 3,566.27 mi (5,739.36 km) |
| Ashburn to Montemor-o-Novo | 3,630.28 mi (5,842.37 km) |
| Ashburn to Montemor-o-Velho | 3,566.20 mi (5,739.25 km) |
| Ashburn to Montijo | 3,595.59 mi (5,786.54 km) |
| Ashburn to Mortagua | 3,581.06 mi (5,763.17 km) |
| Ashburn to Moura | 3,682.76 mi (5,926.82 km) |
| Ashburn to Murtosa | 3,553.78 mi (5,719.26 km) |
| Ashburn to Nazare | 3,562.50 mi (5,733.29 km) |
| Ashburn to Nelas | 3,597.46 mi (5,789.56 km) |
| Ashburn to Obidos | 3,564.51 mi (5,736.52 km) |
| Ashburn to Odemira | 3,639.65 mi (5,857.45 km) |
| Ashburn to Odivelas | 3,578.81 mi (5,759.55 km) |
| Ashburn to Oeiras | 3,574.96 mi (5,753.34 km) |
| Ashburn to Olhao | 3,695.30 mi (5,947.01 km) |
| Ashburn to Oliveira de Azemeis | 3,558.68 mi (5,727.14 km) |
