| Duchcov to Orangevale (California) | 5,690.54 mi (9,158.04 km) |
| Duchcov to Orchards (Washington) | 5,289.25 mi (8,512.22 km) |
| Duchcov to Orcutt (California) | 5,905.45 mi (9,503.90 km) |
| Duchcov to Oregon (Ohio) | 4,351.35 mi (7,002.81 km) |
| Duchcov to Oregon (Wisconsin) | 4,499.52 mi (7,241.29 km) |
| Duchcov to Oregon City (Oregon) | 5,312.01 mi (8,548.86 km) |
| Duchcov to Orem (Utah) | 5,344.02 mi (8,600.36 km) |
| Duchcov to Orinda (California) | 5,763.71 mi (9,275.79 km) |
| Duchcov to Orland Park (Illinois) | 4,512.73 mi (7,262.53 km) |
| Duchcov to Orlando (Florida) | 4,932.94 mi (7,938.80 km) |
| Duchcov to Ormond Beach (Florida) | 4,881.22 mi (7,855.57 km) |
| Duchcov to Oro Valley (Arizona) | 5,785.47 mi (9,310.82 km) |
| Duchcov to Oroville (California) | 5,648.81 mi (9,090.88 km) |
| Duchcov to Oshkosh (Wisconsin) | 4,415.90 mi (7,106.70 km) |
| Duchcov to Oskaloosa (Iowa) | 4,694.87 mi (7,555.66 km) |
