| South Portland to Massarosa | 3,850.11 mi (6,196.16 km) |
| South Portland to Matelica | 3,986.69 mi (6,415.95 km) |
| South Portland to Matera | 4,238.95 mi (6,821.93 km) |
| South Portland to Matino | 4,330.18 mi (6,968.75 km) |
| South Portland to Mazzarino | 4,266.02 mi (6,865.50 km) |
| South Portland to Meda | 3,739.21 mi (6,017.68 km) |
| South Portland to Medesano | 3,811.12 mi (6,133.40 km) |
| South Portland to Medicina | 3,884.22 mi (6,251.04 km) |
| South Portland to Meldola | 3,914.27 mi (6,299.40 km) |
| South Portland to Melegnano | 3,756.10 mi (6,044.86 km) |
| South Portland to Melendugno | 4,329.43 mi (6,967.54 km) |
| South Portland to Melfi | 4,184.94 mi (6,735.01 km) |
| South Portland to Melilli | 4,311.83 mi (6,939.22 km) |
| South Portland to Melito di Napoli | 4,126.66 mi (6,641.22 km) |
| South Portland to Melito di Porto Salvo | 4,312.16 mi (6,939.76 km) |
