| Den Helder to Oakley (California) | 5,384.89 mi (8,666.15 km) |
| Den Helder to Oakton (Virginia) | 3,837.46 mi (6,175.80 km) |
| Den Helder to Oakville (Missouri) | 4,350.87 mi (7,002.05 km) |
| Den Helder to Oatfield (Oregon) | 4,963.94 mi (7,988.69 km) |
| Den Helder to Ocala (Florida) | 4,513.56 mi (7,263.87 km) |
| Den Helder to Ocean Acres (New Jersey) | 3,679.11 mi (5,920.96 km) |
| Den Helder to Ocean City (New Jersey) | 3,713.93 mi (5,976.99 km) |
| Den Helder to Ocean Pines (Maryland) | 3,777.08 mi (6,078.62 km) |
| Den Helder to Ocean Pointe (Hawaii) | 7,203.59 mi (11,593.06 km) |
| Den Helder to Ocean Springs (Mississippi) | 4,710.24 mi (7,580.40 km) |
| Den Helder to Oceanside (California) | 5,543.81 mi (8,921.90 km) |
| Den Helder to Oceanside (New York) | 3,612.69 mi (5,814.06 km) |
| Den Helder to Ocoee (Florida) | 4,519.81 mi (7,273.93 km) |
| Den Helder to Oconomowoc (Wisconsin) | 4,052.19 mi (6,521.37 km) |
| Den Helder to Odenton (Maryland) | 3,805.34 mi (6,124.11 km) |
