| Kardzhali to Oswego (Illinois) | 5,349.97 mi (8,609.94 km) |
| Kardzhali to Oswego (New York) | 4,821.83 mi (7,759.99 km) |
| Kardzhali to Otsego (Minnesota) | 5,351.46 mi (8,612.34 km) |
| Kardzhali to Ottawa (Illinois) | 5,383.85 mi (8,664.47 km) |
| Kardzhali to Ottawa (Kansas) | 5,753.83 mi (9,259.89 km) |
| Kardzhali to Ottumwa (Iowa) | 5,528.59 mi (8,897.40 km) |
| Kardzhali to Overland (Missouri) | 5,573.18 mi (8,969.17 km) |
| Kardzhali to Overland Park (Kansas) | 5,718.55 mi (9,203.11 km) |
| Kardzhali to Overlea (Maryland) | 5,001.65 mi (8,049.38 km) |
| Kardzhali to Oviedo (Florida) | 5,694.70 mi (9,164.73 km) |
| Kardzhali to Owasso (Oklahoma) | 5,896.04 mi (9,488.77 km) |
| Kardzhali to Owatonna (Minnesota) | 5,398.92 mi (8,688.71 km) |
| Kardzhali to Owensboro (Kentucky) | 5,497.83 mi (8,847.90 km) |
| Kardzhali to Owings Mills (Maryland) | 5,010.76 mi (8,064.04 km) |
| Kardzhali to Owosso (Michigan) | 5,134.51 mi (8,263.20 km) |
