| Preakness to Mattoon (Illinois) | 751.98 mi (1,210.19 km) |
| Preakness to Mauldin (South Carolina) | 611.96 mi (984.86 km) |
| Preakness to Maumee (Ohio) | 492.01 mi (791.81 km) |
| Preakness to Maumelle (Arkansas) | 1,073.88 mi (1,728.24 km) |
| Preakness to Mayagüez (Puerto Rico) | 1,626.23 mi (2,617.17 km) |
| Preakness to Mayfield Heights (Ohio) | 377.68 mi (607.81 km) |
| Preakness to Mays Chapel (Maryland) | 164.95 mi (265.47 km) |
| Preakness to Maywood (California) | 2,432.13 mi (3,914.14 km) |
| Preakness to Maywood (Illinois) | 708.03 mi (1,139.47 km) |
| Preakness to McAlester (Oklahoma) | 1,241.75 mi (1,998.40 km) |
| Preakness to McAllen (Texas) | 1,706.54 mi (2,746.41 km) |
| Preakness to McCalla (Alabama) | 879.40 mi (1,415.26 km) |
| Preakness to McComb (Mississippi) | 1,124.50 mi (1,809.71 km) |
| Preakness to McDonough (Georgia) | 752.00 mi (1,210.23 km) |
| Preakness to McFarland (California) | 2,440.41 mi (3,927.46 km) |
