| Peterlee to Mangualde | 1,021.74 mi (1,644.33 km) |
| Peterlee to Marco de Canavezes | 988.55 mi (1,590.91 km) |
| Peterlee to Marinha Grande | 1,095.13 mi (1,762.43 km) |
| Peterlee to Massama | 1,166.12 mi (1,876.70 km) |
| Peterlee to Matosinhos | 996.76 mi (1,604.13 km) |
| Peterlee to Mealhada | 1,046.01 mi (1,683.38 km) |
| Peterlee to Melgaco | 928.53 mi (1,494.33 km) |
| Peterlee to Melres | 999.93 mi (1,609.23 km) |
| Peterlee to Mira | 1,046.85 mi (1,684.74 km) |
| Peterlee to Miranda do Corvo | 1,063.20 mi (1,711.05 km) |
| Peterlee to Mirandela | 955.25 mi (1,537.33 km) |
| Peterlee to Mogadouro | 959.77 mi (1,544.60 km) |
| Peterlee to Moimenta da Beira | 994.69 mi (1,600.79 km) |
| Peterlee to Moita | 1,169.00 mi (1,881.32 km) |
| Peterlee to Moncao | 934.71 mi (1,504.27 km) |
