| Port Huron to Montijo | 3,828.67 mi (6,161.65 km) |
| Port Huron to Montilla | 3,968.26 mi (6,386.29 km) |
| Port Huron to Montmelo | 4,132.25 mi (6,650.22 km) |
| Port Huron to Montornes del Valles | 4,133.38 mi (6,652.03 km) |
| Port Huron to Montoro | 3,964.03 mi (6,379.49 km) |
| Port Huron to Monzon | 4,029.19 mi (6,484.36 km) |
| Port Huron to Mora | 3,931.74 mi (6,327.53 km) |
| Port Huron to Moralzarzal | 3,887.97 mi (6,257.08 km) |
| Port Huron to Moron de la Frontera | 3,946.97 mi (6,352.03 km) |
| Port Huron to Mostoles | 3,904.63 mi (6,283.89 km) |
| Port Huron to Motril | 4,051.01 mi (6,519.46 km) |
| Port Huron to Muchamiel | 4,129.81 mi (6,646.28 km) |
| Port Huron to Mula | 4,096.16 mi (6,592.13 km) |
| Port Huron to Munguia | 3,845.53 mi (6,188.78 km) |
| Port Huron to Murcia | 4,114.72 mi (6,622.00 km) |
