| Castelo Branco to Marsala | 1,080.03 mi (1,738.13 km) |
| Castelo Branco to Marsciano | 1,047.89 mi (1,686.41 km) |
| Castelo Branco to Martano | 1,360.82 mi (2,190.03 km) |
| Castelo Branco to Martellago | 1,070.60 mi (1,722.97 km) |
| Castelo Branco to Martina Franca | 1,306.47 mi (2,102.55 km) |
| Castelo Branco to Martinengo | 960.20 mi (1,545.30 km) |
| Castelo Branco to Martinsicuro | 1,127.63 mi (1,814.75 km) |
| Castelo Branco to Mascali | 1,227.59 mi (1,975.61 km) |
| Castelo Branco to Mascalucia | 1,222.69 mi (1,967.74 km) |
| Castelo Branco to Masera di Padova | 1,052.97 mi (1,694.59 km) |
| Castelo Branco to Maserada sul Piave | 1,081.66 mi (1,740.76 km) |
| Castelo Branco to Massa | 949.94 mi (1,528.79 km) |
| Castelo Branco to Massa Lombarda | 1,037.34 mi (1,669.43 km) |
| Castelo Branco to Massafra | 1,295.95 mi (2,085.63 km) |
| Castelo Branco to Massalubrense | 1,151.17 mi (1,852.63 km) |
