| Rio Grande City to Masanasa | 5,499.11 mi (8,849.96 km) |
| Rio Grande City to Masquefa | 5,539.61 mi (8,915.15 km) |
| Rio Grande City to Matadepera | 5,546.24 mi (8,925.81 km) |
| Rio Grande City to Mazarron | 5,508.52 mi (8,865.11 km) |
| Rio Grande City to Meco | 5,325.25 mi (8,570.15 km) |
| Rio Grande City to Medina del Campo | 5,228.60 mi (8,414.63 km) |
| Rio Grande City to Medina Sidonia | 5,309.49 mi (8,544.80 km) |
| Rio Grande City to Mejorada del Campo | 5,326.76 mi (8,572.59 km) |
| Rio Grande City to Meliana | 5,497.94 mi (8,848.07 km) |
| Rio Grande City to Mengibar | 5,374.11 mi (8,648.80 km) |
| Rio Grande City to Merida | 5,223.17 mi (8,405.89 km) |
| Rio Grande City to Miajadas | 5,229.78 mi (8,416.52 km) |
| Rio Grande City to Mieres | 5,136.94 mi (8,267.11 km) |
| Rio Grande City to Miguelturra | 5,339.16 mi (8,592.55 km) |
| Rio Grande City to Mijas | 5,371.11 mi (8,643.97 km) |
