| Harker Heights to Mitchell (South Dakota) | 875.82 mi (1,409.50 km) |
| Harker Heights to Mitchellville (Maryland) | 1,294.54 mi (2,083.36 km) |
| Harker Heights to Moberly (Missouri) | 647.83 mi (1,042.58 km) |
| Harker Heights to Mobile (Alabama) | 565.53 mi (910.13 km) |
| Harker Heights to Modesto (California) | 1,403.43 mi (2,258.61 km) |
| Harker Heights to Mokena (Illinois) | 904.02 mi (1,454.88 km) |
| Harker Heights to Moline (Illinois) | 822.41 mi (1,323.54 km) |
| Harker Heights to Moncks Corner (South Carolina) | 1,040.98 mi (1,675.29 km) |
| Harker Heights to Monfort Heights (Ohio) | 924.65 mi (1,488.08 km) |
| Harker Heights to Monmouth (Oregon) | 1,676.91 mi (2,698.73 km) |
| Harker Heights to Monroe (Georgia) | 833.37 mi (1,341.18 km) |
| Harker Heights to Monroe (Louisiana) | 342.14 mi (550.62 km) |
| Harker Heights to Monroe (Michigan) | 1,088.22 mi (1,751.32 km) |
| Harker Heights to Monroe (North Carolina) | 1,025.10 mi (1,649.74 km) |
| Harker Heights to Monroe (Ohio) | 945.45 mi (1,521.56 km) |
