| Idanha-a-Nova to McKeesport (Pennsylvania) | 3,719.72 mi (5,986.31 km) |
| Idanha-a-Nova to McKinleyville (California) | 5,586.76 mi (8,991.02 km) |
| Idanha-a-Nova to McKinney (Texas) | 4,770.21 mi (7,676.91 km) |
| Idanha-a-Nova to McLean (Virginia) | 3,632.53 mi (5,845.99 km) |
| Idanha-a-Nova to McMinnville (Oregon) | 5,344.82 mi (8,601.65 km) |
| Idanha-a-Nova to McMinnville (Tennessee) | 4,154.71 mi (6,686.35 km) |
| Idanha-a-Nova to McNair (Virginia) | 3,642.89 mi (5,862.66 km) |
| Idanha-a-Nova to McPherson (Kansas) | 4,615.87 mi (7,428.53 km) |
| Idanha-a-Nova to Mead Valley (California) | 5,667.03 mi (9,120.21 km) |
| Idanha-a-Nova to Meadow Woods (Florida) | 4,192.84 mi (6,747.72 km) |
| Idanha-a-Nova to Meadowbrook (Virginia) | 3,691.15 mi (5,940.33 km) |
| Idanha-a-Nova to Meadville (Pennsylvania) | 3,696.54 mi (5,949.00 km) |
| Idanha-a-Nova to Mebane (North Carolina) | 3,821.92 mi (6,150.78 km) |
| Idanha-a-Nova to Mechanicsville (Virginia) | 3,679.42 mi (5,921.45 km) |
| Idanha-a-Nova to Medford (Massachusetts) | 3,246.44 mi (5,224.64 km) |
