| Williamstown to Mattoon (Illinois) | 712.18 mi (1,146.14 km) |
| Williamstown to Mauldin (South Carolina) | 526.18 mi (846.80 km) |
| Williamstown to Maumee (Ohio) | 473.39 mi (761.84 km) |
| Williamstown to Maumelle (Arkansas) | 1,012.46 mi (1,629.40 km) |
| Williamstown to Mayagüez (Puerto Rico) | 1,556.78 mi (2,505.39 km) |
| Williamstown to Mayfield Heights (Ohio) | 362.32 mi (583.09 km) |
| Williamstown to Mays Chapel (Maryland) | 90.81 mi (146.15 km) |
| Williamstown to Maywood (California) | 2,398.17 mi (3,859.48 km) |
| Williamstown to Maywood (Illinois) | 689.19 mi (1,109.15 km) |
| Williamstown to McAlester (Oklahoma) | 1,186.14 mi (1,908.90 km) |
| Williamstown to McAllen (Texas) | 1,630.46 mi (2,623.97 km) |
| Williamstown to McCalla (Alabama) | 800.57 mi (1,288.40 km) |
| Williamstown to McComb (Mississippi) | 1,046.61 mi (1,684.36 km) |
| Williamstown to McDonough (Georgia) | 666.74 mi (1,073.02 km) |
| Williamstown to McFarland (California) | 2,411.61 mi (3,881.11 km) |
