| Santarem to Mangualde | 106.61 mi (171.58 km) |
| Santarem to Marco de Canavezes | 137.63 mi (221.49 km) |
| Santarem to Marinha Grande | 38.02 mi (61.18 km) |
| Santarem to Massama | 45.67 mi (73.50 km) |
| Santarem to Matosinhos | 134.69 mi (216.77 km) |
| Santarem to Mealhada | 80.40 mi (129.39 km) |
| Santarem to Melgaco | 200.39 mi (322.50 km) |
| Santarem to Melres | 127.53 mi (205.24 km) |
| Santarem to Mira | 82.91 mi (133.43 km) |
| Santarem to Miranda do Corvo | 62.71 mi (100.93 km) |
| Santarem to Mirandela | 174.55 mi (280.92 km) |
| Santarem to Mogadouro | 178.36 mi (287.04 km) |
| Santarem to Moimenta da Beira | 133.27 mi (214.48 km) |
| Santarem to Moita | 43.39 mi (69.83 km) |
| Santarem to Moncao | 196.48 mi (316.20 km) |
