| Meridian to Montalegre | 5,062.68 mi (8,147.60 km) |
| Meridian to Montemor-o-Novo | 5,200.22 mi (8,368.95 km) |
| Meridian to Montemor-o-Velho | 5,109.11 mi (8,222.31 km) |
| Meridian to Montijo | 5,172.32 mi (8,324.04 km) |
| Meridian to Mortagua | 5,113.25 mi (8,228.99 km) |
| Meridian to Moura | 5,254.83 mi (8,456.84 km) |
| Meridian to Murtosa | 5,083.76 mi (8,181.52 km) |
| Meridian to Nazare | 5,121.76 mi (8,242.67 km) |
| Meridian to Nelas | 5,123.62 mi (8,245.67 km) |
| Meridian to Obidos | 5,129.89 mi (8,255.76 km) |
| Meridian to Odemira | 5,235.92 mi (8,426.40 km) |
| Meridian to Odivelas | 5,156.36 mi (8,298.36 km) |
| Meridian to Oeiras | 5,156.21 mi (8,298.12 km) |
| Meridian to Olhao | 5,293.94 mi (8,519.78 km) |
| Meridian to Oliveira de Azemeis | 5,084.58 mi (8,182.84 km) |
