| Thornton to McKeesport (Pennsylvania) | 3,591.25 mi (5,779.57 km) |
| Thornton to McKinleyville (California) | 5,050.30 mi (8,127.68 km) |
| Thornton to McKinney (Texas) | 4,587.93 mi (7,383.56 km) |
| Thornton to McLean (Virginia) | 3,553.80 mi (5,719.29 km) |
| Thornton to McMinnville (Oregon) | 4,776.80 mi (7,687.52 km) |
| Thornton to McMinnville (Tennessee) | 4,047.02 mi (6,513.04 km) |
| Thornton to McNair (Virginia) | 3,561.96 mi (5,732.43 km) |
| Thornton to McPherson (Kansas) | 4,352.95 mi (7,005.39 km) |
| Thornton to Mead Valley (California) | 5,265.10 mi (8,473.36 km) |
| Thornton to Meadow Woods (Florida) | 4,244.80 mi (6,831.34 km) |
| Thornton to Meadowbrook (Virginia) | 3,636.79 mi (5,852.85 km) |
| Thornton to Meadville (Pennsylvania) | 3,541.97 mi (5,700.26 km) |
| Thornton to Mebane (North Carolina) | 3,772.97 mi (6,072.01 km) |
| Thornton to Mechanicsville (Virginia) | 3,622.74 mi (5,830.24 km) |
| Thornton to Medford (Massachusetts) | 3,155.73 mi (5,078.65 km) |
