| Port Huron to Montevarchi | 4,447.94 mi (7,158.27 km) |
| Port Huron to Monticello Conte Otto | 4,365.25 mi (7,025.19 km) |
| Port Huron to Montichiari | 4,325.18 mi (6,960.70 km) |
| Port Huron to Montignoso | 4,371.37 mi (7,035.04 km) |
| Port Huron to Montopoli in Val d'Arno | 4,409.06 mi (7,095.70 km) |
| Port Huron to Monza | 4,273.92 mi (6,878.22 km) |
| Port Huron to Morbegno | 4,264.43 mi (6,862.93 km) |
| Port Huron to Mori | 4,331.63 mi (6,971.09 km) |
| Port Huron to Morlupo | 4,542.89 mi (7,311.08 km) |
| Port Huron to Morrovalle | 4,537.87 mi (7,303.00 km) |
| Port Huron to Mortara | 4,265.71 mi (6,865.00 km) |
| Port Huron to Mosciano Sant'Angelo | 4,573.61 mi (7,360.51 km) |
| Port Huron to Motta di Livenza | 4,398.42 mi (7,078.57 km) |
| Port Huron to Motta Sant'Anastasia | 4,844.08 mi (7,795.79 km) |
| Port Huron to Mottola | 4,791.81 mi (7,711.67 km) |
