| Karlovy Vary to Marco de Canavezes | 1,185.25 mi (1,907.47 km) |
| Karlovy Vary to Marinha Grande | 1,280.70 mi (2,061.08 km) |
| Karlovy Vary to Massama | 1,340.56 mi (2,157.43 km) |
| Karlovy Vary to Matosinhos | 1,207.57 mi (1,943.40 km) |
| Karlovy Vary to Mealhada | 1,232.67 mi (1,983.79 km) |
| Karlovy Vary to Melgaco | 1,150.61 mi (1,851.73 km) |
| Karlovy Vary to Melres | 1,200.43 mi (1,931.91 km) |
| Karlovy Vary to Mira | 1,241.78 mi (1,998.45 km) |
| Karlovy Vary to Miranda do Corvo | 1,240.86 mi (1,996.98 km) |
| Karlovy Vary to Mirandela | 1,133.07 mi (1,823.49 km) |
| Karlovy Vary to Mogadouro | 1,121.13 mi (1,804.28 km) |
| Karlovy Vary to Moimenta da Beira | 1,172.60 mi (1,887.11 km) |
| Karlovy Vary to Moita | 1,334.29 mi (2,147.34 km) |
| Karlovy Vary to Moncao | 1,161.20 mi (1,868.76 km) |
| Karlovy Vary to Montalegre | 1,143.32 mi (1,840.00 km) |
