| Harker Heights to Indianola (Iowa) | 747.24 mi (1,202.57 km) |
| Harker Heights to Indio (California) | 1,098.63 mi (1,768.08 km) |
| Harker Heights to Inglewood (California) | 1,220.50 mi (1,964.20 km) |
| Harker Heights to Inkster (Michigan) | 1,107.58 mi (1,782.47 km) |
| Harker Heights to Inver Grove Heights (Minnesota) | 983.06 mi (1,582.09 km) |
| Harker Heights to Inwood (New York) | 1,485.99 mi (2,391.47 km) |
| Harker Heights to Iona (Florida) | 999.15 mi (1,607.97 km) |
| Harker Heights to Ionia (Michigan) | 1,074.22 mi (1,728.78 km) |
| Harker Heights to Iowa City (Iowa) | 806.91 mi (1,298.60 km) |
| Harker Heights to Irmo (South Carolina) | 979.33 mi (1,576.08 km) |
| Harker Heights to Irondale (Alabama) | 663.72 mi (1,068.15 km) |
| Harker Heights to Ironton (Ohio) | 991.99 mi (1,596.46 km) |
| Harker Heights to Irvine (California) | 1,186.63 mi (1,909.69 km) |
| Harker Heights to Irving (Texas) | 130.57 mi (210.13 km) |
| Harker Heights to Isabela (Puerto Rico) | 2,098.34 mi (3,376.95 km) |
