| Castelo Branco to Monticello (Minnesota) | 4,191.11 mi (6,744.94 km) |
| Castelo Branco to Montrose (Colorado) | 5,052.77 mi (8,131.64 km) |
| Castelo Branco to Moody (Alabama) | 4,252.40 mi (6,843.57 km) |
| Castelo Branco to Moore (Oklahoma) | 4,715.63 mi (7,589.07 km) |
| Castelo Branco to Moorestown-Lenola (New Jersey) | 3,484.85 mi (5,608.33 km) |
| Castelo Branco to Mooresville (North Carolina) | 3,904.24 mi (6,283.27 km) |
| Castelo Branco to Moorhead (Minnesota) | 4,262.52 mi (6,859.87 km) |
| Castelo Branco to Moorpark (California) | 5,704.72 mi (9,180.85 km) |
| Castelo Branco to Moraga (California) | 5,661.79 mi (9,111.77 km) |
| Castelo Branco to Moreno Valley (California) | 5,652.45 mi (9,096.73 km) |
| Castelo Branco to Morgan City (Louisiana) | 4,629.81 mi (7,450.95 km) |
| Castelo Branco to Morgan Hill (California) | 5,677.97 mi (9,137.81 km) |
| Castelo Branco to Morganton (North Carolina) | 3,942.37 mi (6,344.64 km) |
| Castelo Branco to Morgantown (West Virginia) | 3,735.42 mi (6,011.58 km) |
| Castelo Branco to Morris (Illinois) | 4,080.80 mi (6,567.42 km) |
