| Williamsport to Mattoon (Illinois) | 608.11 mi (978.65 km) |
| Williamsport to Mauldin (South Carolina) | 530.10 mi (853.11 km) |
| Williamsport to Maumee (Ohio) | 344.09 mi (553.75 km) |
| Williamsport to Maumelle (Arkansas) | 943.36 mi (1,518.18 km) |
| Williamsport to Mayagüez (Puerto Rico) | 1,696.20 mi (2,729.77 km) |
| Williamsport to Mayfield Heights (Ohio) | 229.74 mi (369.74 km) |
| Williamsport to Mays Chapel (Maryland) | 126.39 mi (203.41 km) |
| Williamsport to Maywood (California) | 2,285.02 mi (3,677.39 km) |
| Williamsport to Maywood (Illinois) | 560.10 mi (901.40 km) |
| Williamsport to McAlester (Oklahoma) | 1,105.49 mi (1,779.12 km) |
| Williamsport to McAllen (Texas) | 1,592.57 mi (2,562.99 km) |
| Williamsport to McCalla (Alabama) | 775.29 mi (1,247.71 km) |
| Williamsport to McComb (Mississippi) | 1,016.28 mi (1,635.55 km) |
| Williamsport to McDonough (Georgia) | 665.16 mi (1,070.47 km) |
| Williamsport to McFarland (California) | 2,292.63 mi (3,689.63 km) |
