| Koyulhisar to Opwijk | 1,764.73 mi (2,840.05 km) |
| Koyulhisar to Ostend | 1,821.99 mi (2,932.21 km) |
| Koyulhisar to Oud-Heverlee | 1,742.24 mi (2,803.87 km) |
| Koyulhisar to Oud-Turnhout | 1,735.97 mi (2,793.78 km) |
| Koyulhisar to Oudenaarde | 1,788.12 mi (2,877.71 km) |
| Koyulhisar to Oudenburg | 1,818.01 mi (2,925.81 km) |
| Koyulhisar to Oupeye | 1,698.71 mi (2,733.82 km) |
| Koyulhisar to Overijse | 1,747.25 mi (2,811.93 km) |
| Koyulhisar to Overpelt | 1,716.15 mi (2,761.88 km) |
| Koyulhisar to Paal | 1,723.70 mi (2,774.03 km) |
| Koyulhisar to Peer | 1,713.27 mi (2,757.24 km) |
| Koyulhisar to Pepinster | 1,689.18 mi (2,718.47 km) |
| Koyulhisar to Peruwelz | 1,784.73 mi (2,872.24 km) |
| Koyulhisar to Perwez | 1,732.99 mi (2,788.98 km) |
| Koyulhisar to Philippeville | 1,738.94 mi (2,798.55 km) |
