| Placentia to Mattoon (Illinois) | 1,671.34 mi (2,689.77 km) |
| Placentia to Mauldin (South Carolina) | 2,018.78 mi (3,248.91 km) |
| Placentia to Maumee (Ohio) | 1,928.62 mi (3,103.82 km) |
| Placentia to Maumelle (Arkansas) | 1,449.44 mi (2,332.65 km) |
| Placentia to Mayagüez (Puerto Rico) | 3,293.26 mi (5,299.99 km) |
| Placentia to Mayfield Heights (Ohio) | 2,042.42 mi (3,286.95 km) |
| Placentia to Mays Chapel (Maryland) | 2,295.63 mi (3,694.45 km) |
| Placentia to Maywood (California) | 20.46 mi (32.93 km) |
| Placentia to Maywood (Illinois) | 1,717.10 mi (2,763.40 km) |
| Placentia to McAlester (Oklahoma) | 1,258.36 mi (2,025.13 km) |
| Placentia to McAllen (Texas) | 1,283.54 mi (2,065.65 km) |
| Placentia to McCalla (Alabama) | 1,767.90 mi (2,845.15 km) |
| Placentia to McComb (Mississippi) | 1,600.24 mi (2,575.33 km) |
| Placentia to McDonough (Georgia) | 1,929.78 mi (3,105.68 km) |
| Placentia to McFarland (California) | 147.00 mi (236.57 km) |
