| Rio Grande City to Monroe (Ohio) | 1,228.77 mi (1,977.51 km) |
| Rio Grande City to Monroe (Washington) | 1,941.76 mi (3,124.97 km) |
| Rio Grande City to Monroe (Wisconsin) | 1,234.98 mi (1,987.50 km) |
| Rio Grande City to Monroeville (Pennsylvania) | 1,460.52 mi (2,350.48 km) |
| Rio Grande City to Monrovia (California) | 1,261.21 mi (2,029.72 km) |
| Rio Grande City to Monsey (New York) | 1,738.69 mi (2,798.15 km) |
| Rio Grande City to Montclair (California) | 1,243.20 mi (2,000.73 km) |
| Rio Grande City to Montclair (Virginia) | 1,504.19 mi (2,420.76 km) |
| Rio Grande City to Montebello (California) | 1,264.10 mi (2,034.38 km) |
| Rio Grande City to Monterey (California) | 1,525.26 mi (2,454.67 km) |
| Rio Grande City to Monterey Park (California) | 1,266.07 mi (2,037.54 km) |
| Rio Grande City to Montgomery (Alabama) | 860.21 mi (1,384.38 km) |
| Rio Grande City to Montgomery (Illinois) | 1,215.24 mi (1,955.74 km) |
| Rio Grande City to Montgomery (Ohio) | 1,220.38 mi (1,964.02 km) |
| Rio Grande City to Montgomery Village (Maryland) | 1,529.64 mi (2,461.72 km) |
