| Smolyan to Oswego (Illinois) | 5,329.04 mi (8,576.27 km) |
| Smolyan to Oswego (New York) | 4,798.70 mi (7,722.76 km) |
| Smolyan to Otsego (Minnesota) | 5,333.22 mi (8,582.99 km) |
| Smolyan to Ottawa (Illinois) | 5,362.94 mi (8,630.82 km) |
| Smolyan to Ottawa (Kansas) | 5,733.80 mi (9,227.67 km) |
| Smolyan to Ottumwa (Iowa) | 5,508.54 mi (8,865.15 km) |
| Smolyan to Overland (Missouri) | 5,551.79 mi (8,934.74 km) |
| Smolyan to Overland Park (Kansas) | 5,698.44 mi (9,170.76 km) |
| Smolyan to Overlea (Maryland) | 4,977.05 mi (8,009.78 km) |
| Smolyan to Oviedo (Florida) | 5,667.84 mi (9,121.50 km) |
| Smolyan to Owasso (Oklahoma) | 5,875.45 mi (9,455.62 km) |
| Smolyan to Owatonna (Minnesota) | 5,380.16 mi (8,658.53 km) |
| Smolyan to Owensboro (Kentucky) | 5,475.25 mi (8,811.56 km) |
| Smolyan to Owings Mills (Maryland) | 4,986.23 mi (8,024.57 km) |
| Smolyan to Owosso (Michigan) | 5,112.99 mi (8,228.57 km) |
