| Sofia to Oswego (Illinois) | 5,224.89 mi (8,408.64 km) |
| Sofia to Oswego (New York) | 4,695.34 mi (7,556.43 km) |
| Sofia to Otsego (Minnesota) | 5,229.01 mi (8,415.28 km) |
| Sofia to Ottawa (Illinois) | 5,258.78 mi (8,463.19 km) |
| Sofia to Ottawa (Kansas) | 5,629.52 mi (9,059.84 km) |
| Sofia to Ottumwa (Iowa) | 5,404.27 mi (8,697.33 km) |
| Sofia to Overland (Missouri) | 5,447.74 mi (8,767.29 km) |
| Sofia to Overland Park (Kansas) | 5,594.17 mi (9,002.95 km) |
| Sofia to Overlea (Maryland) | 4,874.69 mi (7,845.06 km) |
| Sofia to Oviedo (Florida) | 5,567.91 mi (8,960.68 km) |
| Sofia to Owasso (Oklahoma) | 5,771.23 mi (9,287.90 km) |
| Sofia to Owatonna (Minnesota) | 5,275.89 mi (8,490.72 km) |
| Sofia to Owensboro (Kentucky) | 5,371.62 mi (8,644.79 km) |
| Sofia to Owings Mills (Maryland) | 4,883.81 mi (7,859.74 km) |
| Sofia to Owosso (Michigan) | 5,008.98 mi (8,061.17 km) |
