| Giresun to Oswego (Illinois) | 5,829.59 mi (9,381.81 km) |
| Giresun to Oswego (New York) | 5,342.14 mi (8,597.35 km) |
| Giresun to Otsego (Minnesota) | 5,784.80 mi (9,309.73 km) |
| Giresun to Ottawa (Illinois) | 5,862.94 mi (9,435.49 km) |
| Giresun to Ottawa (Kansas) | 6,214.72 mi (10,001.62 km) |
| Giresun to Ottumwa (Iowa) | 5,991.67 mi (9,642.66 km) |
| Giresun to Overland (Missouri) | 6,059.04 mi (9,751.09 km) |
| Giresun to Overland Park (Kansas) | 6,181.05 mi (9,947.44 km) |
| Giresun to Overlea (Maryland) | 5,544.75 mi (8,923.41 km) |
| Giresun to Oviedo (Florida) | 6,270.67 mi (10,091.66 km) |
| Giresun to Owasso (Oklahoma) | 6,365.66 mi (10,244.53 km) |
| Giresun to Owatonna (Minnesota) | 5,840.89 mi (9,400.00 km) |
| Giresun to Owensboro (Kentucky) | 6,004.36 mi (9,663.09 km) |
| Giresun to Owings Mills (Maryland) | 5,552.55 mi (8,935.97 km) |
| Giresun to Owosso (Michigan) | 5,625.82 mi (9,053.88 km) |
