| Gary to Mauldin (South Carolina) | 544.11 mi (875.66 km) |
| Gary to Maumee (Ohio) | 190.38 mi (306.38 km) |
| Gary to Maumelle (Arkansas) | 540.10 mi (869.21 km) |
| Gary to Mayagüez (Puerto Rico) | 2,008.03 mi (3,231.61 km) |
| Gary to Mayfield Heights (Ohio) | 304.72 mi (490.41 km) |
| Gary to Mays Chapel (Maryland) | 580.82 mi (934.74 km) |
| Gary to Maywood (California) | 1,753.22 mi (2,821.54 km) |
| Gary to Maywood (Illinois) | 32.49 mi (52.30 km) |
| Gary to McAlester (Oklahoma) | 648.24 mi (1,043.25 km) |
| Gary to McAllen (Texas) | 1,229.55 mi (1,978.78 km) |
| Gary to McCalla (Alabama) | 572.92 mi (922.03 km) |
| Gary to McComb (Mississippi) | 735.51 mi (1,183.70 km) |
| Gary to McDonough (Georgia) | 589.66 mi (948.97 km) |
| Gary to McFarland (California) | 1,758.43 mi (2,829.92 km) |
| Gary to McHenry (Illinois) | 70.95 mi (114.18 km) |
