| Rio Grande City to Middletown (New York) | 1,733.36 mi (2,789.57 km) |
| Rio Grande City to Middletown (Ohio) | 1,231.49 mi (1,981.90 km) |
| Rio Grande City to Midland (Michigan) | 1,444.72 mi (2,325.06 km) |
| Rio Grande City to Midland (Texas) | 437.53 mi (704.13 km) |
| Rio Grande City to Midlothian (Illinois) | 1,227.77 mi (1,975.90 km) |
| Rio Grande City to Midlothian (Texas) | 434.70 mi (699.59 km) |
| Rio Grande City to Midlothian (Virginia) | 1,454.00 mi (2,339.98 km) |
| Rio Grande City to Midvale (Utah) | 1,235.68 mi (1,988.63 km) |
| Rio Grande City to Midway (Florida) | 768.89 mi (1,237.41 km) |
| Rio Grande City to Midwest City (Oklahoma) | 633.36 mi (1,019.29 km) |
| Rio Grande City to Milford (Delaware) | 1,605.72 mi (2,584.16 km) |
| Rio Grande City to Milford city (Connecticut) | 1,788.51 mi (2,878.33 km) |
| Rio Grande City to Milford Mill (Maryland) | 1,555.25 mi (2,502.93 km) |
| Rio Grande City to Mililani Mauka (Hawaii) | 3,720.78 mi (5,988.02 km) |
| Rio Grande City to Mililani Town (Hawaii) | 3,722.62 mi (5,990.97 km) |
