| Portimao to McKeesport (Pennsylvania) | 3,741.87 mi (6,021.95 km) |
| Portimao to McKinleyville (California) | 5,678.33 mi (9,138.38 km) |
| Portimao to McKinney (Texas) | 4,792.83 mi (7,713.32 km) |
| Portimao to McLean (Virginia) | 3,645.42 mi (5,866.74 km) |
| Portimao to McMinnville (Oregon) | 5,444.71 mi (8,762.41 km) |
| Portimao to McMinnville (Tennessee) | 4,167.69 mi (6,707.25 km) |
| Portimao to McNair (Virginia) | 3,656.11 mi (5,883.95 km) |
| Portimao to McPherson (Kansas) | 4,656.70 mi (7,494.24 km) |
| Portimao to Mead Valley (California) | 5,728.97 mi (9,219.89 km) |
| Portimao to Meadow Woods (Florida) | 4,172.10 mi (6,714.35 km) |
| Portimao to Meadowbrook (Virginia) | 3,698.25 mi (5,951.76 km) |
| Portimao to Meadville (Pennsylvania) | 3,724.36 mi (5,993.77 km) |
| Portimao to Mebane (North Carolina) | 3,826.33 mi (6,157.88 km) |
| Portimao to Mechanicsville (Virginia) | 3,687.14 mi (5,933.89 km) |
| Portimao to Medford (Massachusetts) | 3,267.04 mi (5,257.80 km) |
