| Haskovo to Oswego (Illinois) | 5,343.21 mi (8,599.06 km) |
| Haskovo to Oswego (New York) | 4,816.84 mi (7,751.95 km) |
| Haskovo to Otsego (Minnesota) | 5,342.75 mi (8,598.33 km) |
| Haskovo to Ottawa (Illinois) | 5,377.08 mi (8,653.57 km) |
| Haskovo to Ottawa (Kansas) | 5,746.38 mi (9,247.91 km) |
| Haskovo to Ottumwa (Iowa) | 5,521.16 mi (8,885.46 km) |
| Haskovo to Overland (Missouri) | 5,566.77 mi (8,958.85 km) |
| Haskovo to Overland Park (Kansas) | 5,711.16 mi (9,191.22 km) |
| Haskovo to Overlea (Maryland) | 4,997.92 mi (8,043.37 km) |
| Haskovo to Oviedo (Florida) | 5,693.06 mi (9,162.10 km) |
| Haskovo to Owasso (Oklahoma) | 5,889.02 mi (9,477.46 km) |
| Haskovo to Owatonna (Minnesota) | 5,390.57 mi (8,675.29 km) |
| Haskovo to Owensboro (Kentucky) | 5,492.36 mi (8,839.10 km) |
| Haskovo to Owings Mills (Maryland) | 5,006.95 mi (8,057.92 km) |
| Haskovo to Owosso (Michigan) | 5,128.21 mi (8,253.06 km) |
