| South Portland to Mirfield | 3,079.58 mi (4,956.10 km) |
| South Portland to Mitcham | 3,189.14 mi (5,132.43 km) |
| South Portland to Mold | 3,032.22 mi (4,879.89 km) |
| South Portland to Molesey | 3,180.54 mi (5,118.58 km) |
| South Portland to Monkseaton | 3,063.15 mi (4,929.66 km) |
| South Portland to Monmouth | 3,075.64 mi (4,949.77 km) |
| South Portland to Montrose | 2,997.70 mi (4,824.33 km) |
| South Portland to Morden | 3,187.37 mi (5,129.58 km) |
| South Portland to Morecambe | 3,025.94 mi (4,869.78 km) |
| South Portland to Moreton | 3,028.71 mi (4,874.23 km) |
| South Portland to Morley | 3,081.65 mi (4,959.44 km) |
| South Portland to Morpeth | 3,052.09 mi (4,911.86 km) |
| South Portland to Morriston | 3,028.74 mi (4,874.29 km) |
| South Portland to Mosbrough | 3,099.43 mi (4,988.05 km) |
| South Portland to Mossley | 3,068.99 mi (4,939.07 km) |
