| Ciechanow to Marco de Canavezes | 1,562.15 mi (2,514.04 km) |
| Ciechanow to Marinha Grande | 1,658.95 mi (2,669.82 km) |
| Ciechanow to Massama | 1,719.53 mi (2,767.32 km) |
| Ciechanow to Matosinhos | 1,583.82 mi (2,548.91 km) |
| Ciechanow to Mealhada | 1,610.54 mi (2,591.91 km) |
| Ciechanow to Melgaco | 1,525.32 mi (2,454.77 km) |
| Ciechanow to Melres | 1,577.26 mi (2,538.35 km) |
| Ciechanow to Mira | 1,619.30 mi (2,606.01 km) |
| Ciechanow to Miranda do Corvo | 1,619.19 mi (2,605.84 km) |
| Ciechanow to Mirandela | 1,510.51 mi (2,430.92 km) |
| Ciechanow to Mogadouro | 1,499.26 mi (2,412.83 km) |
| Ciechanow to Moimenta da Beira | 1,550.40 mi (2,495.13 km) |
| Ciechanow to Moita | 1,713.50 mi (2,757.61 km) |
| Ciechanow to Moncao | 1,535.70 mi (2,471.47 km) |
| Ciechanow to Montalegre | 1,519.39 mi (2,445.21 km) |
