| Castelo Branco to Mitchell (South Dakota) | 4,425.97 mi (7,122.91 km) |
| Castelo Branco to Mitchellville (Maryland) | 3,603.88 mi (5,799.89 km) |
| Castelo Branco to Moberly (Missouri) | 4,330.74 mi (6,969.65 km) |
| Castelo Branco to Mobile (Alabama) | 4,439.37 mi (7,144.47 km) |
| Castelo Branco to Modesto (California) | 5,628.49 mi (9,058.18 km) |
| Castelo Branco to Mokena (Illinois) | 4,050.41 mi (6,518.51 km) |
| Castelo Branco to Moline (Illinois) | 4,171.35 mi (6,713.15 km) |
| Castelo Branco to Moncks Corner (South Carolina) | 3,943.30 mi (6,346.12 km) |
| Castelo Branco to Monfort Heights (Ohio) | 3,972.40 mi (6,392.95 km) |
| Castelo Branco to Monmouth (Oregon) | 5,359.71 mi (8,625.61 km) |
| Castelo Branco to Monroe (Georgia) | 4,107.63 mi (6,610.59 km) |
| Castelo Branco to Monroe (Louisiana) | 4,565.81 mi (7,347.97 km) |
| Castelo Branco to Monroe (Michigan) | 3,831.09 mi (6,165.55 km) |
| Castelo Branco to Monroe (North Carolina) | 3,909.86 mi (6,292.31 km) |
| Castelo Branco to Monroe (Ohio) | 3,952.60 mi (6,361.10 km) |
