| Giresun to Odessa (Texas) | 6,818.08 mi (10,972.63 km) |
| Giresun to Ogden (Utah) | 6,465.26 mi (10,404.83 km) |
| Giresun to Oildale (California) | 6,970.65 mi (11,218.18 km) |
| Giresun to Ojus (Florida) | 6,369.14 mi (10,250.14 km) |
| Giresun to Okemos (Michigan) | 5,648.89 mi (9,091.01 km) |
| Giresun to Oklahoma City (Oklahoma) | 6,463.89 mi (10,402.63 km) |
| Giresun to Okmulgee (Oklahoma) | 6,410.16 mi (10,316.15 km) |
| Giresun to Olathe (Kansas) | 6,185.21 mi (9,954.14 km) |
| Giresun to Old Jamestown (Missouri) | 6,048.40 mi (9,733.96 km) |
| Giresun to Oldsmar (Florida) | 6,361.29 mi (10,237.51 km) |
| Giresun to Olean (New York) | 5,478.27 mi (8,816.42 km) |
| Giresun to Olive Branch (Mississippi) | 6,250.07 mi (10,058.52 km) |
| Giresun to Olivehurst (California) | 6,767.14 mi (10,890.66 km) |
| Giresun to Olney (Maryland) | 5,576.14 mi (8,973.93 km) |
| Giresun to Olympia (Washington) | 6,251.74 mi (10,061.20 km) |
