| Diamond Bar to Mauldin (South Carolina) | 2,014.90 mi (3,242.66 km) |
| Diamond Bar to Maumee (Ohio) | 1,923.01 mi (3,094.79 km) |
| Diamond Bar to Maumelle (Arkansas) | 1,445.85 mi (2,326.87 km) |
| Diamond Bar to Mayagüez (Puerto Rico) | 3,291.87 mi (5,297.76 km) |
| Diamond Bar to Mayfield Heights (Ohio) | 2,036.85 mi (3,277.99 km) |
| Diamond Bar to Mays Chapel (Maryland) | 2,290.51 mi (3,686.22 km) |
| Diamond Bar to Maywood (California) | 21.30 mi (34.28 km) |
| Diamond Bar to Maywood (Illinois) | 1,711.32 mi (2,754.11 km) |
| Diamond Bar to McAlester (Oklahoma) | 1,254.81 mi (2,019.42 km) |
| Diamond Bar to McAllen (Texas) | 1,284.12 mi (2,066.59 km) |
| Diamond Bar to McCalla (Alabama) | 1,764.63 mi (2,839.90 km) |
| Diamond Bar to McComb (Mississippi) | 1,597.86 mi (2,571.50 km) |
| Diamond Bar to McDonough (Georgia) | 1,926.34 mi (3,100.14 km) |
| Diamond Bar to McFarland (California) | 141.38 mi (227.52 km) |
| Diamond Bar to McHenry (Illinois) | 1,693.77 mi (2,725.86 km) |
