| South Portland to Marsala | 4,166.90 mi (6,705.98 km) |
| South Portland to Marsciano | 3,969.98 mi (6,389.07 km) |
| South Portland to Martano | 4,330.67 mi (6,969.54 km) |
| South Portland to Martellago | 3,869.32 mi (6,227.07 km) |
| South Portland to Martina Franca | 4,269.22 mi (6,870.65 km) |
| South Portland to Martinengo | 3,767.87 mi (6,063.80 km) |
| South Portland to Martinsicuro | 4,039.18 mi (6,500.43 km) |
| South Portland to Mascali | 4,292.87 mi (6,908.71 km) |
| South Portland to Mascalucia | 4,293.50 mi (6,909.71 km) |
| South Portland to Masera di Padova | 3,865.08 mi (6,220.24 km) |
| South Portland to Maserada sul Piave | 3,868.94 mi (6,226.46 km) |
| South Portland to Massa | 3,835.73 mi (6,173.01 km) |
| South Portland to Massa Lombarda | 3,893.18 mi (6,265.46 km) |
| South Portland to Massafra | 4,264.51 mi (6,863.06 km) |
| South Portland to Massalubrense | 4,143.21 mi (6,667.85 km) |
