| Hartlepool to Mangualde | 1,018.80 mi (1,639.60 km) |
| Hartlepool to Marco de Canavezes | 985.79 mi (1,586.48 km) |
| Hartlepool to Marinha Grande | 1,092.44 mi (1,758.12 km) |
| Hartlepool to Massama | 1,163.43 mi (1,872.36 km) |
| Hartlepool to Matosinhos | 994.18 mi (1,599.98 km) |
| Hartlepool to Mealhada | 1,043.25 mi (1,678.95 km) |
| Hartlepool to Melgaco | 925.94 mi (1,490.16 km) |
| Hartlepool to Melres | 997.24 mi (1,604.91 km) |
| Hartlepool to Mira | 1,044.19 mi (1,680.46 km) |
| Hartlepool to Miranda do Corvo | 1,060.37 mi (1,706.51 km) |
| Hartlepool to Mirandela | 952.22 mi (1,532.45 km) |
| Hartlepool to Mogadouro | 956.58 mi (1,539.46 km) |
| Hartlepool to Moimenta da Beira | 991.74 mi (1,596.05 km) |
| Hartlepool to Moita | 1,166.21 mi (1,876.84 km) |
| Hartlepool to Moncao | 932.18 mi (1,500.20 km) |
