| Oudewater to Marco de Canavezes | 967.63 mi (1,557.24 km) |
| Oudewater to Marinha Grande | 1,072.72 mi (1,726.37 km) |
| Oudewater to Massama | 1,140.37 mi (1,835.25 km) |
| Oudewater to Matosinhos | 984.21 mi (1,583.93 km) |
| Oudewater to Mealhada | 1,022.12 mi (1,644.95 km) |
| Oudewater to Melgaco | 919.12 mi (1,479.18 km) |
| Oudewater to Melres | 981.69 mi (1,579.88 km) |
| Oudewater to Mira | 1,027.60 mi (1,653.76 km) |
| Oudewater to Miranda do Corvo | 1,035.10 mi (1,665.83 km) |
| Oudewater to Mirandela | 922.03 mi (1,483.87 km) |
| Oudewater to Mogadouro | 917.63 mi (1,476.79 km) |
| Oudewater to Moimenta da Beira | 963.55 mi (1,550.68 km) |
| Oudewater to Moita | 1,138.41 mi (1,832.10 km) |
| Oudewater to Moncao | 928.16 mi (1,493.73 km) |
| Oudewater to Montalegre | 920.85 mi (1,481.96 km) |
