| Donostia to Mangualde | 351.20 mi (565.19 km) |
| Donostia to Marco de Canavezes | 348.26 mi (560.47 km) |
| Donostia to Marinha Grande | 435.85 mi (701.43 km) |
| Donostia to Massama | 493.56 mi (794.30 km) |
| Donostia to Matosinhos | 373.90 mi (601.74 km) |
| Donostia to Mealhada | 389.76 mi (627.26 km) |
| Donostia to Melgaco | 329.69 mi (530.59 km) |
| Donostia to Melres | 363.52 mi (585.02 km) |
| Donostia to Mira | 400.42 mi (644.42 km) |
| Donostia to Miranda do Corvo | 395.91 mi (637.15 km) |
| Donostia to Mirandela | 294.04 mi (473.21 km) |
| Donostia to Mogadouro | 278.12 mi (447.59 km) |
| Donostia to Moimenta da Beira | 330.69 mi (532.19 km) |
| Donostia to Moita | 487.06 mi (783.84 km) |
| Donostia to Moncao | 341.03 mi (548.83 km) |
