| Oak Harbor to Oswego (Illinois) | 1,721.19 mi (2,769.98 km) |
| Oak Harbor to Oswego (New York) | 2,210.20 mi (3,556.98 km) |
| Oak Harbor to Otsego (Minnesota) | 1,380.13 mi (2,221.11 km) |
| Oak Harbor to Ottawa (Illinois) | 1,709.19 mi (2,750.68 km) |
| Oak Harbor to Ottawa (Kansas) | 1,516.59 mi (2,440.72 km) |
| Oak Harbor to Ottumwa (Iowa) | 1,555.89 mi (2,503.97 km) |
| Oak Harbor to Overland (Missouri) | 1,731.85 mi (2,787.15 km) |
| Oak Harbor to Overland Park (Kansas) | 1,530.85 mi (2,463.67 km) |
| Oak Harbor to Overlea (Maryland) | 2,341.83 mi (3,768.81 km) |
| Oak Harbor to Oviedo (Florida) | 2,576.08 mi (4,145.80 km) |
| Oak Harbor to Owasso (Oklahoma) | 1,589.13 mi (2,557.46 km) |
| Oak Harbor to Owatonna (Minnesota) | 1,426.67 mi (2,296.00 km) |
| Oak Harbor to Owensboro (Kentucky) | 1,914.90 mi (3,081.73 km) |
| Oak Harbor to Owings Mills (Maryland) | 2,327.59 mi (3,745.89 km) |
| Oak Harbor to Owosso (Michigan) | 1,872.81 mi (3,014.00 km) |
