| Fort Oglethorpe to Montalegre | 4,078.81 mi (6,564.22 km) |
| Fort Oglethorpe to Montemor-o-Novo | 4,139.49 mi (6,661.87 km) |
| Fort Oglethorpe to Montemor-o-Velho | 4,077.05 mi (6,561.37 km) |
| Fort Oglethorpe to Montijo | 4,104.54 mi (6,605.62 km) |
| Fort Oglethorpe to Mortagua | 4,092.33 mi (6,585.96 km) |
| Fort Oglethorpe to Moura | 4,191.63 mi (6,745.78 km) |
| Fort Oglethorpe to Murtosa | 4,065.22 mi (6,542.33 km) |
| Fort Oglethorpe to Nazare | 4,072.56 mi (6,554.16 km) |
| Fort Oglethorpe to Nelas | 4,108.92 mi (6,612.67 km) |
| Fort Oglethorpe to Obidos | 4,074.24 mi (6,556.85 km) |
| Fort Oglethorpe to Odemira | 4,147.14 mi (6,674.18 km) |
| Fort Oglethorpe to Odivelas | 4,087.79 mi (6,578.66 km) |
| Fort Oglethorpe to Oeiras | 4,083.73 mi (6,572.12 km) |
| Fort Oglethorpe to Olhao | 4,202.36 mi (6,763.04 km) |
| Fort Oglethorpe to Oliveira de Azemeis | 4,070.26 mi (6,550.46 km) |
