| Castelo Branco to Montilla | 218.40 mi (351.47 km) |
| Castelo Branco to Montmelo | 524.44 mi (844.01 km) |
| Castelo Branco to Montornes del Valles | 525.18 mi (845.20 km) |
| Castelo Branco to Montoro | 208.64 mi (335.77 km) |
| Castelo Branco to Monzon | 426.88 mi (686.99 km) |
| Castelo Branco to Mora | 197.97 mi (318.60 km) |
| Castelo Branco to Moralzarzal | 195.39 mi (314.46 km) |
| Castelo Branco to Moron de la Frontera | 216.63 mi (348.64 km) |
| Castelo Branco to Mostoles | 195.37 mi (314.41 km) |
| Castelo Branco to Motril | 302.54 mi (486.89 km) |
| Castelo Branco to Muchamiel | 390.28 mi (628.10 km) |
| Castelo Branco to Mula | 345.40 mi (555.87 km) |
| Castelo Branco to Munguia | 342.78 mi (551.65 km) |
| Castelo Branco to Murcia | 365.00 mi (587.42 km) |
| Castelo Branco to Muro del Alcoy | 384.32 mi (618.51 km) |
