| Portchester to McKeesport (Pennsylvania) | 3,690.36 mi (5,939.06 km) |
| Portchester to McKinleyville (California) | 5,223.54 mi (8,406.47 km) |
| Portchester to McKinney (Texas) | 4,702.94 mi (7,568.66 km) |
| Portchester to McLean (Virginia) | 3,643.23 mi (5,863.22 km) |
| Portchester to McMinnville (Oregon) | 4,953.55 mi (7,971.97 km) |
| Portchester to McMinnville (Tennessee) | 4,145.35 mi (6,671.30 km) |
| Portchester to McNair (Virginia) | 3,651.88 mi (5,877.13 km) |
| Portchester to McPherson (Kansas) | 4,480.88 mi (7,211.28 km) |
| Portchester to Mead Valley (California) | 5,419.52 mi (8,721.88 km) |
| Portchester to Meadow Woods (Florida) | 4,313.82 mi (6,942.42 km) |
| Portchester to Meadowbrook (Virginia) | 3,722.21 mi (5,990.31 km) |
| Portchester to Meadville (Pennsylvania) | 3,645.57 mi (5,866.98 km) |
| Portchester to Mebane (North Carolina) | 3,858.36 mi (6,209.43 km) |
| Portchester to Mechanicsville (Virginia) | 3,708.49 mi (5,968.24 km) |
| Portchester to Medford (Massachusetts) | 3,244.10 mi (5,220.87 km) |
