| Duchcov to Odessa (Texas) | 5,537.66 mi (8,912.01 km) |
| Duchcov to Ogden (Utah) | 5,296.98 mi (8,524.67 km) |
| Duchcov to Oildale (California) | 5,834.78 mi (9,390.17 km) |
| Duchcov to Ojus (Florida) | 5,014.89 mi (8,070.69 km) |
| Duchcov to Okemos (Michigan) | 4,335.38 mi (6,977.12 km) |
| Duchcov to Oklahoma City (Oklahoma) | 5,173.20 mi (8,325.45 km) |
| Duchcov to Okmulgee (Oklahoma) | 5,112.99 mi (8,228.57 km) |
| Duchcov to Olathe (Kansas) | 4,896.31 mi (7,879.84 km) |
| Duchcov to Old Jamestown (Missouri) | 4,740.20 mi (7,628.61 km) |
| Duchcov to Oldsmar (Florida) | 5,008.85 mi (8,060.97 km) |
| Duchcov to Olean (New York) | 4,145.58 mi (6,671.67 km) |
| Duchcov to Olive Branch (Mississippi) | 4,926.55 mi (7,928.51 km) |
| Duchcov to Olivehurst (California) | 5,674.58 mi (9,132.35 km) |
| Duchcov to Olney (Maryland) | 4,232.67 mi (6,811.83 km) |
| Duchcov to Olympia (Washington) | 5,213.66 mi (8,390.57 km) |
