| Harker Heights to Mauldin (South Carolina) | 925.16 mi (1,488.91 km) |
| Harker Heights to Maumee (Ohio) | 1,062.04 mi (1,709.19 km) |
| Harker Heights to Maumelle (Arkansas) | 401.39 mi (645.97 km) |
| Harker Heights to Mayagüez (Puerto Rico) | 2,102.20 mi (3,383.16 km) |
| Harker Heights to Mayfield Heights (Ohio) | 1,152.24 mi (1,854.34 km) |
| Harker Heights to Mays Chapel (Maryland) | 1,314.05 mi (2,114.75 km) |
| Harker Heights to Maywood (California) | 1,211.68 mi (1,950.02 km) |
| Harker Heights to Maywood (Illinois) | 923.64 mi (1,486.45 km) |
| Harker Heights to McAlester (Oklahoma) | 288.43 mi (464.18 km) |
| Harker Heights to McAllen (Texas) | 335.85 mi (540.49 km) |
| Harker Heights to McCalla (Alabama) | 639.48 mi (1,029.15 km) |
| Harker Heights to McComb (Mississippi) | 424.27 mi (682.79 km) |
| Harker Heights to McDonough (Georgia) | 804.90 mi (1,295.36 km) |
| Harker Heights to McFarland (California) | 1,283.52 mi (2,065.63 km) |
| Harker Heights to McHenry (Illinois) | 934.58 mi (1,504.06 km) |
