| Heerlerbaan to Montemor-o-Novo | 1,091.52 mi (1,756.63 km) |
| Heerlerbaan to Montemor-o-Velho | 1,022.43 mi (1,645.45 km) |
| Heerlerbaan to Montijo | 1,110.95 mi (1,787.91 km) |
| Heerlerbaan to Mortagua | 993.23 mi (1,598.44 km) |
| Heerlerbaan to Moura | 1,098.30 mi (1,767.54 km) |
| Heerlerbaan to Murtosa | 990.54 mi (1,594.12 km) |
| Heerlerbaan to Nazare | 1,065.74 mi (1,715.14 km) |
| Heerlerbaan to Nelas | 976.18 mi (1,571.00 km) |
| Heerlerbaan to Obidos | 1,081.91 mi (1,741.16 km) |
| Heerlerbaan to Odemira | 1,165.27 mi (1,875.32 km) |
| Heerlerbaan to Odivelas | 1,113.90 mi (1,792.64 km) |
| Heerlerbaan to Oeiras | 1,124.23 mi (1,809.28 km) |
| Heerlerbaan to Olhao | 1,174.62 mi (1,890.36 km) |
| Heerlerbaan to Oliveira de Azemeis | 979.56 mi (1,576.46 km) |
| Heerlerbaan to Oliveira de Frades | 976.36 mi (1,571.30 km) |
