| Harker Heights to Monticello (Minnesota) | 1,005.61 mi (1,618.38 km) |
| Harker Heights to Montrose (Colorado) | 772.63 mi (1,243.43 km) |
| Harker Heights to Moody (Alabama) | 673.75 mi (1,084.30 km) |
| Harker Heights to Moore (Oklahoma) | 295.33 mi (475.30 km) |
| Harker Heights to Moorestown-Lenola (New Jersey) | 1,410.83 mi (2,270.52 km) |
| Harker Heights to Mooresville (North Carolina) | 1,018.57 mi (1,639.23 km) |
| Harker Heights to Moorhead (Minnesota) | 1,093.42 mi (1,759.69 km) |
| Harker Heights to Moorpark (California) | 1,252.48 mi (2,015.66 km) |
| Harker Heights to Moraga (California) | 1,466.23 mi (2,359.67 km) |
| Harker Heights to Moreno Valley (California) | 1,155.16 mi (1,859.06 km) |
| Harker Heights to Morgan City (Louisiana) | 395.74 mi (636.89 km) |
| Harker Heights to Morgan Hill (California) | 1,431.26 mi (2,303.40 km) |
| Harker Heights to Morganton (North Carolina) | 973.58 mi (1,566.83 km) |
| Harker Heights to Morgantown (West Virginia) | 1,157.15 mi (1,862.26 km) |
| Harker Heights to Morris (Illinois) | 877.48 mi (1,412.16 km) |
