| Giresun to Opwijk | 1,764.23 mi (2,839.25 km) |
| Giresun to Ostend | 1,821.25 mi (2,931.03 km) |
| Giresun to Oud-Heverlee | 1,741.90 mi (2,803.31 km) |
| Giresun to Oud-Turnhout | 1,734.55 mi (2,791.48 km) |
| Giresun to Oudenaarde | 1,787.99 mi (2,877.50 km) |
| Giresun to Oudenburg | 1,817.35 mi (2,924.74 km) |
| Giresun to Oupeye | 1,698.37 mi (2,733.27 km) |
| Giresun to Overijse | 1,747.04 mi (2,811.60 km) |
| Giresun to Overpelt | 1,714.81 mi (2,759.72 km) |
| Giresun to Paal | 1,722.80 mi (2,772.58 km) |
| Giresun to Peer | 1,712.09 mi (2,755.35 km) |
| Giresun to Pepinster | 1,689.09 mi (2,718.33 km) |
| Giresun to Peruwelz | 1,785.28 mi (2,873.13 km) |
| Giresun to Perwez | 1,733.04 mi (2,789.06 km) |
| Giresun to Philippeville | 1,739.93 mi (2,800.15 km) |
