| Middle River to Masanasa | 3,928.30 mi (6,321.99 km) |
| Middle River to Masquefa | 3,968.80 mi (6,387.16 km) |
| Middle River to Matadepera | 3,975.55 mi (6,398.03 km) |
| Middle River to Mazarron | 3,940.22 mi (6,341.17 km) |
| Middle River to Meco | 3,754.37 mi (6,042.08 km) |
| Middle River to Medina del Campo | 3,657.60 mi (5,886.34 km) |
| Middle River to Medina Sidonia | 3,747.96 mi (6,031.76 km) |
| Middle River to Mejorada del Campo | 3,756.01 mi (6,044.71 km) |
| Middle River to Meliana | 3,927.04 mi (6,319.96 km) |
| Middle River to Mengibar | 3,806.85 mi (6,126.53 km) |
| Middle River to Merida | 3,655.82 mi (5,883.48 km) |
| Middle River to Miajadas | 3,661.78 mi (5,893.06 km) |
| Middle River to Mieres | 3,565.75 mi (5,738.52 km) |
| Middle River to Miguelturra | 3,770.25 mi (6,067.63 km) |
| Middle River to Mijas | 3,807.80 mi (6,128.06 km) |
