| Giresun to Octeville | 2,010.69 mi (3,235.89 km) |
| Giresun to Oignies | 1,810.50 mi (2,913.72 km) |
| Giresun to Oissel | 1,887.13 mi (3,037.05 km) |
| Giresun to Olivet | 1,845.65 mi (2,970.29 km) |
| Giresun to Ollioules | 1,666.73 mi (2,682.35 km) |
| Giresun to Olonne-sur-Mer | 2,019.91 mi (3,250.74 km) |
| Giresun to Oloron-Sainte-Marie | 1,988.64 mi (3,200.41 km) |
| Giresun to Onet Village | 1,820.23 mi (2,929.38 km) |
| Giresun to Onnaing | 1,783.38 mi (2,870.07 km) |
| Giresun to Orange | 1,712.22 mi (2,755.56 km) |
| Giresun to Orchies | 1,799.63 mi (2,896.23 km) |
| Giresun to Orleans | 1,845.33 mi (2,969.78 km) |
| Giresun to Orly | 1,825.70 mi (2,938.18 km) |
| Giresun to Ormesson-sur-Marne | 1,819.27 mi (2,927.84 km) |
| Giresun to Orsay | 1,834.85 mi (2,952.91 km) |
