| Karhula to Marco de Canavezes | 1,989.88 mi (3,202.40 km) |
| Karhula to Marinha Grande | 2,094.45 mi (3,370.70 km) |
| Karhula to Massama | 2,161.38 mi (3,478.40 km) |
| Karhula to Matosinhos | 2,006.72 mi (3,229.51 km) |
| Karhula to Mealhada | 2,043.96 mi (3,289.43 km) |
| Karhula to Melgaco | 1,941.62 mi (3,124.73 km) |
| Karhula to Melres | 2,004.04 mi (3,225.19 km) |
| Karhula to Mira | 2,049.76 mi (3,298.77 km) |
| Karhula to Miranda do Corvo | 2,056.43 mi (3,309.51 km) |
| Karhula to Mirandela | 1,943.52 mi (3,127.79 km) |
| Karhula to Mogadouro | 1,938.01 mi (3,118.93 km) |
| Karhula to Moimenta da Beira | 1,984.98 mi (3,194.52 km) |
| Karhula to Moita | 2,158.73 mi (3,474.13 km) |
| Karhula to Moncao | 1,950.60 mi (3,139.19 km) |
| Karhula to Montalegre | 1,943.26 mi (3,127.38 km) |
