| Celbridge to Marco de Canavezes | 843.14 mi (1,356.91 km) |
| Celbridge to Marinha Grande | 945.57 mi (1,521.75 km) |
| Celbridge to Massama | 1,015.78 mi (1,634.73 km) |
| Celbridge to Matosinhos | 845.80 mi (1,361.18 km) |
| Celbridge to Mealhada | 899.54 mi (1,447.67 km) |
| Celbridge to Melgaco | 779.40 mi (1,254.33 km) |
| Celbridge to Melres | 852.28 mi (1,371.61 km) |
| Celbridge to Mira | 897.52 mi (1,444.42 km) |
| Celbridge to Miranda do Corvo | 918.52 mi (1,478.22 km) |
| Celbridge to Mirandela | 819.48 mi (1,318.83 km) |
| Celbridge to Mogadouro | 829.49 mi (1,334.93 km) |
| Celbridge to Moimenta da Beira | 855.34 mi (1,376.54 km) |
| Celbridge to Moita | 1,021.45 mi (1,643.86 km) |
| Celbridge to Moncao | 783.45 mi (1,260.85 km) |
| Celbridge to Montalegre | 797.71 mi (1,283.79 km) |
