| Harmanli to Oak Harbor (Washington) | 5,914.11 mi (9,517.84 km) |
| Harmanli to Oak Hills (Oregon) | 6,093.43 mi (9,806.42 km) |
| Harmanli to Oak Lawn (Illinois) | 5,332.66 mi (8,582.08 km) |
| Harmanli to Oak Park (California) | 6,720.78 mi (10,816.06 km) |
| Harmanli to Oak Park (Illinois) | 5,325.43 mi (8,570.45 km) |
| Harmanli to Oak Park (Michigan) | 5,128.87 mi (8,254.12 km) |
| Harmanli to Oak Ridge (Florida) | 5,726.49 mi (9,215.89 km) |
| Harmanli to Oak Ridge (New Jersey) | 4,855.85 mi (7,814.73 km) |
| Harmanli to Oak Ridge (Tennessee) | 5,483.37 mi (8,824.64 km) |
| Harmanli to Oakdale (California) | 6,545.70 mi (10,534.29 km) |
| Harmanli to Oakdale (Minnesota) | 5,346.60 mi (8,604.53 km) |
| Harmanli to Oakland (California) | 6,573.96 mi (10,579.77 km) |
| Harmanli to Oakland (New Jersey) | 4,845.50 mi (7,798.07 km) |
| Harmanli to Oakland Park (Florida) | 5,781.25 mi (9,304.02 km) |
| Harmanli to Oakleaf Plantation (Florida) | 5,662.60 mi (9,113.08 km) |
