| Den Helder to Oswego (Illinois) | 4,116.31 mi (6,624.55 km) |
| Den Helder to Oswego (New York) | 3,594.50 mi (5,784.79 km) |
| Den Helder to Otsego (Minnesota) | 4,122.31 mi (6,634.22 km) |
| Den Helder to Ottawa (Illinois) | 4,150.18 mi (6,679.06 km) |
| Den Helder to Ottawa (Kansas) | 4,520.35 mi (7,274.80 km) |
| Den Helder to Ottumwa (Iowa) | 4,295.09 mi (6,912.28 km) |
| Den Helder to Overland (Missouri) | 4,339.97 mi (6,984.51 km) |
| Den Helder to Overland Park (Kansas) | 4,485.00 mi (7,217.91 km) |
| Den Helder to Overlea (Maryland) | 3,784.35 mi (6,090.33 km) |
| Den Helder to Oviedo (Florida) | 4,501.85 mi (7,245.03 km) |
| Den Helder to Owasso (Oklahoma) | 4,662.29 mi (7,503.22 km) |
| Den Helder to Owatonna (Minnesota) | 4,167.98 mi (6,707.71 km) |
| Den Helder to Owensboro (Kentucky) | 4,267.66 mi (6,868.13 km) |
| Den Helder to Owings Mills (Maryland) | 3,792.78 mi (6,103.88 km) |
| Den Helder to Owosso (Michigan) | 3,901.54 mi (6,278.92 km) |
