| Harker Heights to Noventa Vicentina | 5,547.79 mi (8,928.31 km) |
| Harker Heights to Novi di Modena | 5,537.74 mi (8,912.13 km) |
| Harker Heights to Novi Ligure | 5,456.78 mi (8,781.84 km) |
| Harker Heights to Nuoro | 5,650.11 mi (9,092.98 km) |
| Harker Heights to Occhiobello | 5,564.00 mi (8,954.39 km) |
| Harker Heights to Oderzo | 5,566.02 mi (8,957.64 km) |
| Harker Heights to Oggiono | 5,440.92 mi (8,756.32 km) |
| Harker Heights to Olbia | 5,634.09 mi (9,067.19 km) |
| Harker Heights to Oleggio | 5,418.88 mi (8,720.85 km) |
| Harker Heights to Olgiate Comasco | 5,425.47 mi (8,731.46 km) |
| Harker Heights to Olgiate Olona | 5,427.76 mi (8,735.14 km) |
| Harker Heights to Omegna | 5,399.29 mi (8,689.32 km) |
| Harker Heights to Opera | 5,450.73 mi (8,772.10 km) |
| Harker Heights to Oppeano | 5,533.15 mi (8,904.75 km) |
| Harker Heights to Orbassano | 5,396.09 mi (8,684.17 km) |
