| Santo Tirso to McKeesport (Pennsylvania) | 3,619.75 mi (5,825.42 km) |
| Santo Tirso to McKinleyville (California) | 5,471.23 mi (8,805.09 km) |
| Santo Tirso to McKinney (Texas) | 4,669.39 mi (7,514.65 km) |
| Santo Tirso to McLean (Virginia) | 3,535.56 mi (5,689.93 km) |
| Santo Tirso to McMinnville (Oregon) | 5,228.49 mi (8,414.44 km) |
| Santo Tirso to McMinnville (Tennessee) | 4,057.28 mi (6,529.56 km) |
| Santo Tirso to McNair (Virginia) | 3,545.80 mi (5,706.42 km) |
| Santo Tirso to McPherson (Kansas) | 4,510.10 mi (7,258.31 km) |
| Santo Tirso to Mead Valley (California) | 5,556.10 mi (8,941.67 km) |
| Santo Tirso to Meadow Woods (Florida) | 4,107.52 mi (6,610.42 km) |
| Santo Tirso to Meadowbrook (Virginia) | 3,596.06 mi (5,787.30 km) |
| Santo Tirso to Meadville (Pennsylvania) | 3,594.89 mi (5,785.41 km) |
| Santo Tirso to Mebane (North Carolina) | 3,727.62 mi (5,999.03 km) |
| Santo Tirso to Mechanicsville (Virginia) | 3,584.12 mi (5,768.09 km) |
| Santo Tirso to Medford (Massachusetts) | 3,147.37 mi (5,065.21 km) |
