| Middle River to Marsala | 4,586.23 mi (7,380.83 km) |
| Middle River to Marsciano | 4,397.31 mi (7,076.79 km) |
| Middle River to Martano | 4,758.22 mi (7,657.62 km) |
| Middle River to Martellago | 4,299.62 mi (6,919.57 km) |
| Middle River to Martina Franca | 4,696.77 mi (7,558.71 km) |
| Middle River to Martinengo | 4,197.19 mi (6,754.72 km) |
| Middle River to Martinsicuro | 4,467.36 mi (7,189.51 km) |
| Middle River to Mascali | 4,714.65 mi (7,587.50 km) |
| Middle River to Mascalucia | 4,714.84 mi (7,587.81 km) |
| Middle River to Masera di Padova | 4,295.02 mi (6,912.17 km) |
| Middle River to Maserada sul Piave | 4,299.51 mi (6,919.39 km) |
| Middle River to Massa | 4,263.31 mi (6,861.13 km) |
| Middle River to Massa Lombarda | 4,322.13 mi (6,955.80 km) |
| Middle River to Massafra | 4,691.77 mi (7,550.68 km) |
| Middle River to Massalubrense | 4,568.68 mi (7,352.59 km) |
