| Galveston to Mauldin (South Carolina) | 829.77 mi (1,335.38 km) |
| Galveston to Maumee (Ohio) | 1,058.39 mi (1,703.31 km) |
| Galveston to Maumelle (Arkansas) | 413.71 mi (665.81 km) |
| Galveston to Mayagüez (Puerto Rico) | 1,907.63 mi (3,070.03 km) |
| Galveston to Mayfield Heights (Ohio) | 1,133.68 mi (1,824.48 km) |
| Galveston to Mays Chapel (Maryland) | 1,252.32 mi (2,015.41 km) |
| Galveston to Maywood (California) | 1,405.90 mi (2,262.59 km) |
| Galveston to Maywood (Illinois) | 957.54 mi (1,541.01 km) |
| Galveston to McAlester (Oklahoma) | 395.64 mi (636.72 km) |
| Galveston to McAllen (Texas) | 292.78 mi (471.18 km) |
| Galveston to McCalla (Alabama) | 541.92 mi (872.13 km) |
| Galveston to McComb (Mississippi) | 297.63 mi (478.99 km) |
| Galveston to McDonough (Georgia) | 696.34 mi (1,120.64 km) |
| Galveston to McFarland (California) | 1,482.86 mi (2,386.43 km) |
| Galveston to McHenry (Illinois) | 976.32 mi (1,571.23 km) |
