| Portalegre to Lubbeek | 995.16 mi (1,601.56 km) |
| Portalegre to Lummen | 1,010.79 mi (1,626.71 km) |
| Portalegre to Maaseik | 1,034.04 mi (1,664.12 km) |
| Portalegre to Machelen | 985.15 mi (1,585.44 km) |
| Portalegre to Maldegem | 973.71 mi (1,567.04 km) |
| Portalegre to Malmedy | 1,007.25 mi (1,621.02 km) |
| Portalegre to Manage | 957.80 mi (1,541.42 km) |
| Portalegre to Marche-en-Famenne | 976.17 mi (1,570.99 km) |
| Portalegre to Mariakerke | 973.08 mi (1,566.03 km) |
| Portalegre to Mechelen | 992.59 mi (1,597.41 km) |
| Portalegre to Mechelen-aan-de-Maas | 1,026.27 mi (1,651.62 km) |
| Portalegre to Meerhout | 1,015.16 mi (1,633.75 km) |
| Portalegre to Meise | 983.47 mi (1,582.74 km) |
| Portalegre to Melle | 972.43 mi (1,564.98 km) |
| Portalegre to Melsele | 997.39 mi (1,605.15 km) |
