| Waltham to Mattoon (Illinois) | 914.29 mi (1,471.41 km) |
| Waltham to Mauldin (South Carolina) | 794.45 mi (1,278.54 km) |
| Waltham to Maumee (Ohio) | 639.93 mi (1,029.86 km) |
| Waltham to Maumelle (Arkansas) | 1,250.74 mi (2,012.87 km) |
| Waltham to Mayagüez (Puerto Rico) | 1,688.56 mi (2,717.47 km) |
| Waltham to Mayfield Heights (Ohio) | 527.81 mi (849.42 km) |
| Waltham to Mays Chapel (Maryland) | 348.38 mi (560.66 km) |
| Waltham to Maywood (California) | 2,580.57 mi (4,153.02 km) |
| Waltham to Maywood (Illinois) | 850.02 mi (1,367.97 km) |
| Waltham to McAlester (Oklahoma) | 1,414.20 mi (2,275.93 km) |
| Waltham to McAllen (Texas) | 1,889.56 mi (3,040.96 km) |
| Waltham to McCalla (Alabama) | 1,063.02 mi (1,710.77 km) |
| Waltham to McComb (Mississippi) | 1,307.99 mi (2,105.00 km) |
| Waltham to McDonough (Georgia) | 934.76 mi (1,504.36 km) |
| Waltham to McFarland (California) | 2,582.56 mi (4,156.24 km) |
