| Duluth to Mauldin (South Carolina) | 973.72 mi (1,567.04 km) |
| Duluth to Maumee (Ohio) | 552.44 mi (889.06 km) |
| Duluth to Maumelle (Arkansas) | 823.94 mi (1,326.00 km) |
| Duluth to Mayagüez (Puerto Rico) | 2,431.46 mi (3,913.06 km) |
| Duluth to Mayfield Heights (Ohio) | 641.50 mi (1,032.40 km) |
| Duluth to Mays Chapel (Maryland) | 928.93 mi (1,494.97 km) |
| Duluth to Maywood (California) | 1,619.13 mi (2,605.73 km) |
| Duluth to Maywood (Illinois) | 399.22 mi (642.48 km) |
| Duluth to McAlester (Oklahoma) | 840.24 mi (1,352.23 km) |
| Duluth to McAllen (Texas) | 1,458.71 mi (2,347.57 km) |
| Duluth to McCalla (Alabama) | 968.80 mi (1,559.13 km) |
| Duluth to McComb (Mississippi) | 1,076.78 mi (1,732.90 km) |
| Duluth to McDonough (Georgia) | 1,012.22 mi (1,629.02 km) |
| Duluth to McFarland (California) | 1,592.07 mi (2,562.19 km) |
| Duluth to McHenry (Illinois) | 360.22 mi (579.71 km) |
