| Prienai to Marco de Canavezes | 1,730.11 mi (2,784.35 km) |
| Prienai to Marinha Grande | 1,828.74 mi (2,943.08 km) |
| Prienai to Massama | 1,890.67 mi (3,042.74 km) |
| Prienai to Matosinhos | 1,750.93 mi (2,817.85 km) |
| Prienai to Mealhada | 1,779.77 mi (2,864.26 km) |
| Prienai to Melgaco | 1,690.86 mi (2,721.17 km) |
| Prienai to Melres | 1,745.10 mi (2,808.46 km) |
| Prienai to Mira | 1,788.01 mi (2,877.52 km) |
| Prienai to Miranda do Corvo | 1,789.17 mi (2,879.39 km) |
| Prienai to Mirandela | 1,679.27 mi (2,702.53 km) |
| Prienai to Mogadouro | 1,669.07 mi (2,686.10 km) |
| Prienai to Moimenta da Beira | 1,719.63 mi (2,767.47 km) |
| Prienai to Moita | 1,885.21 mi (3,033.95 km) |
| Prienai to Moncao | 1,701.00 mi (2,737.50 km) |
| Prienai to Montalegre | 1,686.41 mi (2,714.02 km) |
