| Rio Maior to Marsala | 1,156.50 mi (1,861.21 km) |
| Rio Maior to Marsciano | 1,130.92 mi (1,820.04 km) |
| Rio Maior to Martano | 1,441.89 mi (2,320.51 km) |
| Rio Maior to Martellago | 1,153.63 mi (1,856.59 km) |
| Rio Maior to Martina Franca | 1,387.94 mi (2,233.67 km) |
| Rio Maior to Martinengo | 1,042.96 mi (1,678.49 km) |
| Rio Maior to Martinsicuro | 1,210.61 mi (1,948.28 km) |
| Rio Maior to Mascali | 1,304.90 mi (2,100.03 km) |
| Rio Maior to Mascalucia | 1,299.64 mi (2,091.57 km) |
| Rio Maior to Masera di Padova | 1,136.07 mi (1,828.33 km) |
| Rio Maior to Maserada sul Piave | 1,164.61 mi (1,874.26 km) |
| Rio Maior to Massa | 1,033.26 mi (1,662.87 km) |
| Rio Maior to Massa Lombarda | 1,120.64 mi (1,803.50 km) |
| Rio Maior to Massafra | 1,377.30 mi (2,216.55 km) |
| Rio Maior to Massalubrense | 1,232.38 mi (1,983.33 km) |
