| Kocaeli to Opwijk | 1,414.15 mi (2,275.85 km) |
| Kocaeli to Ostend | 1,471.82 mi (2,368.67 km) |
| Kocaeli to Oud-Heverlee | 1,391.20 mi (2,238.92 km) |
| Kocaeli to Oud-Turnhout | 1,390.35 mi (2,237.55 km) |
| Kocaeli to Oudenaarde | 1,435.46 mi (2,310.15 km) |
| Kocaeli to Oudenburg | 1,467.57 mi (2,361.83 km) |
| Kocaeli to Oupeye | 1,348.24 mi (2,169.78 km) |
| Kocaeli to Overijse | 1,395.49 mi (2,245.82 km) |
| Kocaeli to Overpelt | 1,370.39 mi (2,205.43 km) |
| Kocaeli to Paal | 1,375.65 mi (2,213.89 km) |
| Kocaeli to Peer | 1,366.72 mi (2,199.53 km) |
| Kocaeli to Pepinster | 1,337.61 mi (2,152.68 km) |
| Kocaeli to Peruwelz | 1,428.90 mi (2,299.59 km) |
| Kocaeli to Perwez | 1,380.16 mi (2,221.15 km) |
| Kocaeli to Philippeville | 1,381.59 mi (2,223.45 km) |
