| Harker Heights to Nyon | 5,292.53 mi (8,517.51 km) |
| Harker Heights to Oberriet | 5,391.37 mi (8,676.58 km) |
| Harker Heights to Obersiggenthal | 5,334.90 mi (8,585.69 km) |
| Harker Heights to Oberwil | 5,304.76 mi (8,537.19 km) |
| Harker Heights to Oberwingert | 5,352.55 mi (8,614.10 km) |
| Harker Heights to Oftringen | 5,326.33 mi (8,571.90 km) |
| Harker Heights to Olten | 5,324.44 mi (8,568.86 km) |
| Harker Heights to Onex | 5,294.25 mi (8,520.28 km) |
| Harker Heights to Opfikon | 5,347.71 mi (8,606.31 km) |
| Harker Heights to Ostermundigen | 5,322.57 mi (8,565.84 km) |
| Harker Heights to Payerne | 5,305.27 mi (8,538.01 km) |
| Harker Heights to Pfaffikon | 5,358.72 mi (8,624.03 km) |
| Harker Heights to Plan-les-Ouates | 5,295.53 mi (8,522.33 km) |
| Harker Heights to Pratteln | 5,310.41 mi (8,546.27 km) |
| Harker Heights to Prilly | 5,302.05 mi (8,532.82 km) |
