| Karlovo to Marco de Canavezes | 1,686.80 mi (2,714.64 km) |
| Karlovo to Marinha Grande | 1,753.77 mi (2,822.42 km) |
| Karlovo to Massama | 1,792.99 mi (2,885.54 km) |
| Karlovo to Matosinhos | 1,714.48 mi (2,759.18 km) |
| Karlovo to Mealhada | 1,716.58 mi (2,762.57 km) |
| Karlovo to Melgaco | 1,677.59 mi (2,699.82 km) |
| Karlovo to Melres | 1,701.42 mi (2,738.17 km) |
| Karlovo to Mira | 1,729.93 mi (2,784.05 km) |
| Karlovo to Miranda do Corvo | 1,716.25 mi (2,762.03 km) |
| Karlovo to Mirandela | 1,633.00 mi (2,628.06 km) |
| Karlovo to Mogadouro | 1,612.08 mi (2,594.39 km) |
| Karlovo to Moimenta da Beira | 1,663.32 mi (2,676.86 km) |
| Karlovo to Moita | 1,780.68 mi (2,865.73 km) |
| Karlovo to Moncao | 1,688.92 mi (2,718.05 km) |
| Karlovo to Montalegre | 1,658.28 mi (2,668.74 km) |
