| Harmanli to Orangevale (California) | 6,495.51 mi (10,453.52 km) |
| Harmanli to Orchards (Washington) | 6,078.15 mi (9,781.83 km) |
| Harmanli to Orcutt (California) | 6,718.02 mi (10,811.61 km) |
| Harmanli to Oregon (Ohio) | 5,176.65 mi (8,331.01 km) |
| Harmanli to Oregon (Wisconsin) | 5,330.48 mi (8,578.58 km) |
| Harmanli to Oregon City (Oregon) | 6,101.41 mi (9,819.27 km) |
| Harmanli to Orem (Utah) | 6,166.03 mi (9,923.27 km) |
| Harmanli to Orinda (California) | 6,567.41 mi (10,569.23 km) |
| Harmanli to Orland Park (Illinois) | 5,341.85 mi (8,596.88 km) |
| Harmanli to Orlando (Florida) | 5,722.79 mi (9,209.95 km) |
| Harmanli to Ormond Beach (Florida) | 5,673.03 mi (9,129.86 km) |
| Harmanli to Oro Valley (Arizona) | 6,615.20 mi (10,646.14 km) |
| Harmanli to Oroville (California) | 6,451.57 mi (10,382.80 km) |
| Harmanli to Oshkosh (Wisconsin) | 5,247.11 mi (8,444.40 km) |
| Harmanli to Oskaloosa (Iowa) | 5,526.32 mi (8,893.75 km) |
