| Seymour to McHenry (Illinois) | 265.97 mi (428.04 km) |
| Seymour to McKeesport (Pennsylvania) | 335.75 mi (540.34 km) |
| Seymour to McKinleyville (California) | 2,011.73 mi (3,237.57 km) |
| Seymour to McKinney (Texas) | 720.14 mi (1,158.95 km) |
| Seymour to McLean (Virginia) | 467.16 mi (751.82 km) |
| Seymour to McMinnville (Oregon) | 1,942.87 mi (3,126.75 km) |
| Seymour to McMinnville (Tennessee) | 225.41 mi (362.76 km) |
| Seymour to McNair (Virginia) | 455.48 mi (733.02 km) |
| Seymour to McPherson (Kansas) | 635.80 mi (1,023.22 km) |
| Seymour to Mead Valley (California) | 1,772.34 mi (2,852.31 km) |
| Seymour to Meadow Woods (Florida) | 775.88 mi (1,248.66 km) |
| Seymour to Meadowbrook (Virginia) | 468.78 mi (754.42 km) |
| Seymour to Meadville (Pennsylvania) | 355.45 mi (572.05 km) |
| Seymour to Mebane (North Carolina) | 412.93 mi (664.54 km) |
| Seymour to Mechanicsville (Virginia) | 471.60 mi (758.97 km) |
