| South Portland to Montevarchi | 3,915.18 mi (6,300.88 km) |
| South Portland to Monticello Conte Otto | 3,843.41 mi (6,185.37 km) |
| South Portland to Montichiari | 3,799.47 mi (6,114.66 km) |
| South Portland to Montignoso | 3,837.74 mi (6,176.25 km) |
| South Portland to Montopoli in Val d'Arno | 3,875.04 mi (6,236.27 km) |
| South Portland to Monza | 3,746.50 mi (6,029.41 km) |
| South Portland to Morbegno | 3,740.72 mi (6,020.11 km) |
| South Portland to Mori | 3,809.72 mi (6,131.15 km) |
| South Portland to Morlupo | 4,005.60 mi (6,446.39 km) |
| South Portland to Morrovalle | 4,009.01 mi (6,451.87 km) |
| South Portland to Mortara | 3,735.27 mi (6,011.33 km) |
| South Portland to Mosciano Sant'Angelo | 4,042.68 mi (6,506.07 km) |
| South Portland to Motta di Livenza | 3,880.09 mi (6,244.40 km) |
| South Portland to Motta Sant'Anastasia | 4,292.44 mi (6,908.01 km) |
| South Portland to Mottola | 4,258.94 mi (6,854.11 km) |
