| Three Lakes to Mangualde | 4,209.86 mi (6,775.12 km) |
| Three Lakes to Marco de Canavezes | 4,183.01 mi (6,731.91 km) |
| Three Lakes to Marinha Grande | 4,159.19 mi (6,693.57 km) |
| Three Lakes to Massama | 4,153.24 mi (6,683.99 km) |
| Three Lakes to Matosinhos | 4,154.80 mi (6,686.50 km) |
| Three Lakes to Mealhada | 4,176.86 mi (6,722.00 km) |
| Three Lakes to Melgaco | 4,166.68 mi (6,705.62 km) |
| Three Lakes to Melres | 4,171.51 mi (6,713.40 km) |
| Three Lakes to Mira | 4,161.58 mi (6,697.42 km) |
| Three Lakes to Miranda do Corvo | 4,186.30 mi (6,737.20 km) |
| Three Lakes to Mirandela | 4,228.98 mi (6,805.88 km) |
| Three Lakes to Mogadouro | 4,254.55 mi (6,847.04 km) |
| Three Lakes to Moimenta da Beira | 4,212.93 mi (6,780.06 km) |
| Three Lakes to Moita | 4,170.03 mi (6,711.02 km) |
| Three Lakes to Moncao | 4,156.34 mi (6,688.98 km) |
