| Key Largo to Montalegre | 4,215.44 mi (6,784.09 km) |
| Key Largo to Montemor-o-Novo | 4,230.24 mi (6,807.91 km) |
| Key Largo to Montemor-o-Velho | 4,187.71 mi (6,739.47 km) |
| Key Largo to Montijo | 4,193.55 mi (6,748.87 km) |
| Key Largo to Mortagua | 4,208.10 mi (6,772.28 km) |
| Key Largo to Moura | 4,277.70 mi (6,884.29 km) |
| Key Largo to Murtosa | 4,184.05 mi (6,733.58 km) |
| Key Largo to Nazare | 4,174.04 mi (6,717.46 km) |
| Key Largo to Nelas | 4,227.01 mi (6,802.72 km) |
| Key Largo to Obidos | 4,172.00 mi (6,714.18 km) |
| Key Largo to Odemira | 4,221.54 mi (6,793.91 km) |
| Key Largo to Odivelas | 4,177.43 mi (6,722.92 km) |
| Key Largo to Oeiras | 4,171.41 mi (6,713.24 km) |
| Key Largo to Olhao | 4,271.70 mi (6,874.64 km) |
| Key Largo to Oliveira de Azemeis | 4,191.07 mi (6,744.87 km) |
