| Dour to Orangevale (California) | 5,436.57 mi (8,749.31 km) |
| Dour to Orchards (Washington) | 5,063.38 mi (8,148.73 km) |
| Dour to Orcutt (California) | 5,636.35 mi (9,070.83 km) |
| Dour to Oregon (Ohio) | 3,982.54 mi (6,409.29 km) |
| Dour to Oregon (Wisconsin) | 4,150.50 mi (6,679.59 km) |
| Dour to Oregon City (Oregon) | 5,085.24 mi (8,183.91 km) |
| Dour to Orem (Utah) | 5,057.05 mi (8,138.53 km) |
| Dour to Orinda (California) | 5,511.38 mi (8,869.71 km) |
| Dour to Orland Park (Illinois) | 4,154.91 mi (6,686.68 km) |
| Dour to Orlando (Florida) | 4,523.99 mi (7,280.65 km) |
| Dour to Ormond Beach (Florida) | 4,473.49 mi (7,199.39 km) |
| Dour to Oro Valley (Arizona) | 5,470.73 mi (8,804.29 km) |
| Dour to Oroville (California) | 5,398.84 mi (8,688.59 km) |
| Dour to Oshkosh (Wisconsin) | 4,068.77 mi (6,548.06 km) |
| Dour to Oskaloosa (Iowa) | 4,348.92 mi (6,998.90 km) |
