| Monroe to Mattoon (Illinois) | 523.61 mi (842.67 km) |
| Monroe to Mauldin (South Carolina) | 583.24 mi (938.63 km) |
| Monroe to Maumee (Ohio) | 777.84 mi (1,251.81 km) |
| Monroe to Maumelle (Arkansas) | 162.31 mi (261.21 km) |
| Monroe to Mayagüez (Puerto Rico) | 1,837.00 mi (2,956.36 km) |
| Monroe to Mayfield Heights (Ohio) | 853.13 mi (1,372.98 km) |
| Monroe to Mays Chapel (Maryland) | 984.06 mi (1,583.70 km) |
| Monroe to Maywood (California) | 1,507.99 mi (2,426.87 km) |
| Monroe to Maywood (Illinois) | 687.24 mi (1,106.00 km) |
| Monroe to McAlester (Oklahoma) | 269.73 mi (434.09 km) |
| Monroe to McAllen (Texas) | 571.63 mi (919.94 km) |
| Monroe to McCalla (Alabama) | 297.70 mi (479.10 km) |
| Monroe to McComb (Mississippi) | 128.95 mi (207.52 km) |
| Monroe to McDonough (Georgia) | 463.71 mi (746.28 km) |
| Monroe to McFarland (California) | 1,564.37 mi (2,517.60 km) |
