| Portchester to Mauldin (South Carolina) | 4,045.06 mi (6,509.89 km) |
| Portchester to Maumee (Ohio) | 3,789.31 mi (6,098.31 km) |
| Portchester to Maumelle (Arkansas) | 4,452.00 mi (7,164.81 km) |
| Portchester to Mayagüez (Puerto Rico) | 4,209.34 mi (6,774.28 km) |
| Portchester to Mayfield Heights (Ohio) | 3,703.65 mi (5,960.45 km) |
| Portchester to Mays Chapel (Maryland) | 3,599.25 mi (5,792.44 km) |
| Portchester to Maywood (California) | 5,440.55 mi (8,755.72 km) |
| Portchester to Maywood (Illinois) | 3,938.95 mi (6,339.13 km) |
| Portchester to McAlester (Oklahoma) | 4,580.97 mi (7,372.35 km) |
| Portchester to McAllen (Texas) | 5,126.33 mi (8,250.03 km) |
| Portchester to McCalla (Alabama) | 4,311.04 mi (6,937.94 km) |
| Portchester to McComb (Mississippi) | 4,553.37 mi (7,327.94 km) |
| Portchester to McDonough (Georgia) | 4,185.55 mi (6,736.00 km) |
| Portchester to McFarland (California) | 5,378.91 mi (8,656.52 km) |
| Portchester to McHenry (Illinois) | 3,935.36 mi (6,333.35 km) |
