| Harker Heights to Oxford (Alabama) | 709.11 mi (1,141.20 km) |
| Harker Heights to Oxford (Mississippi) | 523.71 mi (842.82 km) |
| Harker Heights to Oxford (Ohio) | 931.14 mi (1,498.52 km) |
| Harker Heights to Oxnard (California) | 1,269.39 mi (2,042.89 km) |
| Harker Heights to Oxon Hill (Maryland) | 1,283.26 mi (2,065.20 km) |
| Harker Heights to Ozark (Alabama) | 708.80 mi (1,140.71 km) |
| Harker Heights to Ozark (Missouri) | 484.58 mi (779.85 km) |
| Harker Heights to Pace (Florida) | 622.11 mi (1,001.18 km) |
| Harker Heights to Pacific Grove (California) | 1,441.12 mi (2,319.25 km) |
| Harker Heights to Pacifica (California) | 1,482.30 mi (2,385.53 km) |
| Harker Heights to Paducah (Kentucky) | 661.29 mi (1,064.25 km) |
| Harker Heights to Pahrump (Nevada) | 1,112.30 mi (1,790.07 km) |
| Harker Heights to Painesville (Ohio) | 1,168.75 mi (1,880.91 km) |
| Harker Heights to Palatine (Illinois) | 930.17 mi (1,496.96 km) |
| Harker Heights to Palatka (Florida) | 956.53 mi (1,539.39 km) |
