| Duchcov to Oswego (Illinois) | 4,525.66 mi (7,283.35 km) |
| Duchcov to Oswego (New York) | 4,009.44 mi (6,452.57 km) |
| Duchcov to Otsego (Minnesota) | 4,521.51 mi (7,276.67 km) |
| Duchcov to Ottawa (Illinois) | 4,559.47 mi (7,337.76 km) |
| Duchcov to Ottawa (Kansas) | 4,926.63 mi (7,928.65 km) |
| Duchcov to Ottumwa (Iowa) | 4,701.49 mi (7,566.32 km) |
| Duchcov to Overland (Missouri) | 4,750.60 mi (7,645.35 km) |
| Duchcov to Overland Park (Kansas) | 4,891.55 mi (7,872.19 km) |
| Duchcov to Overlea (Maryland) | 4,200.82 mi (6,760.56 km) |
| Duchcov to Oviedo (Florida) | 4,917.58 mi (7,914.07 km) |
| Duchcov to Owasso (Oklahoma) | 5,070.41 mi (8,160.04 km) |
| Duchcov to Owatonna (Minnesota) | 4,569.44 mi (7,353.80 km) |
| Duchcov to Owensboro (Kentucky) | 4,681.21 mi (7,533.68 km) |
| Duchcov to Owings Mills (Maryland) | 4,209.20 mi (6,774.05 km) |
| Duchcov to Owosso (Michigan) | 4,312.72 mi (6,940.65 km) |
