| Middle River to Mancha Real | 3,821.98 mi (6,150.88 km) |
| Middle River to Manilva | 3,783.76 mi (6,089.37 km) |
| Middle River to Manises | 3,923.56 mi (6,314.37 km) |
| Middle River to Manlleu | 3,975.52 mi (6,397.98 km) |
| Middle River to Manresa | 3,962.77 mi (6,377.47 km) |
| Middle River to Manzanares | 3,797.39 mi (6,111.31 km) |
| Middle River to Manzanares el Real | 3,723.88 mi (5,993.01 km) |
| Middle River to Maracena | 3,838.85 mi (6,178.04 km) |
| Middle River to Marbella | 3,797.93 mi (6,112.18 km) |
| Middle River to Marchena | 3,746.70 mi (6,029.73 km) |
| Middle River to Marin | 3,448.78 mi (5,550.27 km) |
| Middle River to Marratxi | 4,070.77 mi (6,551.26 km) |
| Middle River to Martorell | 3,975.12 mi (6,397.34 km) |
| Middle River to Martos | 3,806.70 mi (6,126.28 km) |
| Middle River to Masamagrell | 3,926.64 mi (6,319.32 km) |
