| Kastamonu to Mangualde | 2,145.94 mi (3,453.56 km) |
| Kastamonu to Marco de Canavezes | 2,155.27 mi (3,468.57 km) |
| Kastamonu to Marinha Grande | 2,221.81 mi (3,575.66 km) |
| Kastamonu to Massama | 2,260.18 mi (3,637.40 km) |
| Kastamonu to Matosinhos | 2,182.94 mi (3,513.11 km) |
| Kastamonu to Mealhada | 2,184.91 mi (3,516.27 km) |
| Kastamonu to Melgaco | 2,145.75 mi (3,453.24 km) |
| Kastamonu to Melres | 2,169.90 mi (3,492.11 km) |
| Kastamonu to Mira | 2,198.30 mi (3,537.82 km) |
| Kastamonu to Miranda do Corvo | 2,184.42 mi (3,515.49 km) |
| Kastamonu to Mirandela | 2,101.46 mi (3,381.98 km) |
| Kastamonu to Mogadouro | 2,080.55 mi (3,348.32 km) |
| Kastamonu to Moimenta da Beira | 2,131.78 mi (3,430.77 km) |
| Kastamonu to Moita | 2,247.64 mi (3,617.23 km) |
| Kastamonu to Moncao | 2,157.08 mi (3,471.48 km) |
