| Castelo Branco to Mislata | 377.54 mi (607.60 km) |
| Castelo Branco to Moana | 182.44 mi (293.61 km) |
| Castelo Branco to Moguer | 179.23 mi (288.45 km) |
| Castelo Branco to Molina de Segura | 359.05 mi (577.83 km) |
| Castelo Branco to Molins de Rey | 510.86 mi (822.14 km) |
| Castelo Branco to Mollerusa | 456.96 mi (735.41 km) |
| Castelo Branco to Mollet | 522.21 mi (840.42 km) |
| Castelo Branco to Moncada | 520.48 mi (837.62 km) |
| Castelo Branco to Moncada | 378.14 mi (608.56 km) |
| Castelo Branco to Monforte de Lemos | 186.53 mi (300.20 km) |
| Castelo Branco to Monforte del Cid | 376.23 mi (605.49 km) |
| Castelo Branco to Mongat | 524.90 mi (844.75 km) |
| Castelo Branco to Monovar | 369.48 mi (594.62 km) |
| Castelo Branco to Monserrat | 368.52 mi (593.07 km) |
| Castelo Branco to Montijo | 78.40 mi (126.18 km) |
