| Opfikon to McKeesport (Pennsylvania) | 4,186.33 mi (6,737.24 km) |
| Opfikon to McKinleyville (California) | 5,676.29 mi (9,135.10 km) |
| Opfikon to McKinney (Texas) | 5,199.41 mi (8,367.65 km) |
| Opfikon to McLean (Virginia) | 4,137.30 mi (6,658.34 km) |
| Opfikon to McMinnville (Oregon) | 5,399.81 mi (8,690.15 km) |
| Opfikon to McMinnville (Tennessee) | 4,641.09 mi (7,469.11 km) |
| Opfikon to McNair (Virginia) | 4,146.07 mi (6,672.45 km) |
| Opfikon to McPherson (Kansas) | 4,974.87 mi (8,006.28 km) |
| Opfikon to Mead Valley (California) | 5,897.54 mi (9,491.17 km) |
| Opfikon to Meadow Woods (Florida) | 4,799.27 mi (7,723.67 km) |
| Opfikon to Meadowbrook (Virginia) | 4,215.08 mi (6,783.52 km) |
| Opfikon to Meadville (Pennsylvania) | 4,142.03 mi (6,665.95 km) |
| Opfikon to Mebane (North Carolina) | 4,351.13 mi (7,002.46 km) |
| Opfikon to Mechanicsville (Virginia) | 4,201.48 mi (6,761.63 km) |
| Opfikon to Medford (Massachusetts) | 3,738.14 mi (6,015.95 km) |
