| Placentia to McHenry (Illinois) | 1,699.68 mi (2,735.37 km) |
| Placentia to McKeesport (Pennsylvania) | 2,124.44 mi (3,418.95 km) |
| Placentia to McKinleyville (California) | 595.77 mi (958.80 km) |
| Placentia to McKinney (Texas) | 1,218.95 mi (1,961.71 km) |
| Placentia to McLean (Virginia) | 2,268.85 mi (3,651.36 km) |
| Placentia to McMinnville (Oregon) | 832.38 mi (1,339.59 km) |
| Placentia to McMinnville (Tennessee) | 1,816.33 mi (2,923.10 km) |
| Placentia to McNair (Virginia) | 2,257.17 mi (3,632.56 km) |
| Placentia to McPherson (Kansas) | 1,166.27 mi (1,876.93 km) |
| Placentia to Mead Valley (California) | 32.87 mi (52.91 km) |
| Placentia to Meadow Woods (Florida) | 2,181.05 mi (3,510.05 km) |
| Placentia to Meadowbrook (Virginia) | 2,262.99 mi (3,641.94 km) |
| Placentia to Meadville (Pennsylvania) | 2,110.28 mi (3,396.17 km) |
| Placentia to Mebane (North Carolina) | 2,175.14 mi (3,500.55 km) |
| Placentia to Mechanicsville (Virginia) | 2,267.99 mi (3,649.97 km) |
