| Northampton to Mangualde | 866.39 mi (1,394.31 km) |
| Northampton to Marco de Canavezes | 836.12 mi (1,345.61 km) |
| Northampton to Marinha Grande | 943.35 mi (1,518.18 km) |
| Northampton to Massama | 1,013.97 mi (1,631.83 km) |
| Northampton to Matosinhos | 847.00 mi (1,363.12 km) |
| Northampton to Mealhada | 893.32 mi (1,437.65 km) |
| Northampton to Melgaco | 778.93 mi (1,253.57 km) |
| Northampton to Melres | 848.45 mi (1,365.44 km) |
| Northampton to Mira | 895.56 mi (1,441.26 km) |
| Northampton to Miranda do Corvo | 909.44 mi (1,463.61 km) |
| Northampton to Mirandela | 798.90 mi (1,285.71 km) |
| Northampton to Mogadouro | 801.09 mi (1,289.23 km) |
| Northampton to Moimenta da Beira | 839.36 mi (1,350.82 km) |
| Northampton to Moita | 1,015.45 mi (1,634.22 km) |
| Northampton to Moncao | 786.11 mi (1,265.12 km) |
