| Duchcov to Oakley (California) | 5,745.00 mi (9,245.69 km) |
| Duchcov to Oakton (Virginia) | 4,253.91 mi (6,846.01 km) |
| Duchcov to Oakville (Missouri) | 4,761.76 mi (7,663.31 km) |
| Duchcov to Oatfield (Oregon) | 5,307.69 mi (8,541.90 km) |
| Duchcov to Ocala (Florida) | 4,929.71 mi (7,933.60 km) |
| Duchcov to Ocean Acres (New Jersey) | 4,095.71 mi (6,591.41 km) |
| Duchcov to Ocean City (New Jersey) | 4,130.54 mi (6,647.46 km) |
| Duchcov to Ocean Pines (Maryland) | 4,193.68 mi (6,749.08 km) |
| Duchcov to Ocean Pointe (Hawaii) | 7,442.42 mi (11,977.41 km) |
| Duchcov to Ocean Springs (Mississippi) | 5,126.35 mi (8,250.07 km) |
| Duchcov to Oceanside (California) | 5,922.32 mi (9,531.05 km) |
| Duchcov to Oceanside (New York) | 4,029.25 mi (6,484.45 km) |
| Duchcov to Ocoee (Florida) | 4,935.62 mi (7,943.11 km) |
| Duchcov to Oconomowoc (Wisconsin) | 4,459.83 mi (7,177.40 km) |
| Duchcov to Odenton (Maryland) | 4,221.83 mi (6,794.39 km) |
