| Den Helder to Orangevale (California) | 5,330.44 mi (8,578.51 km) |
| Den Helder to Orchards (Washington) | 4,945.90 mi (7,959.66 km) |
| Den Helder to Orcutt (California) | 5,536.84 mi (8,910.68 km) |
| Den Helder to Oregon (Ohio) | 3,938.49 mi (6,338.39 km) |
| Den Helder to Oregon (Wisconsin) | 4,092.49 mi (6,586.23 km) |
| Den Helder to Oregon City (Oregon) | 4,968.12 mi (7,995.42 km) |
| Den Helder to Orem (Utah) | 4,965.13 mi (7,990.61 km) |
| Den Helder to Orinda (California) | 5,404.65 mi (8,697.94 km) |
| Den Helder to Orland Park (Illinois) | 4,102.91 mi (6,602.99 km) |
| Den Helder to Orlando (Florida) | 4,517.23 mi (7,269.78 km) |
| Den Helder to Ormond Beach (Florida) | 4,465.32 mi (7,186.23 km) |
| Den Helder to Oro Valley (Arizona) | 5,393.20 mi (8,679.52 km) |
| Den Helder to Oroville (California) | 5,291.04 mi (8,515.10 km) |
| Den Helder to Oshkosh (Wisconsin) | 4,009.46 mi (6,452.60 km) |
| Den Helder to Oskaloosa (Iowa) | 4,289.02 mi (6,902.51 km) |
