| Gebze to Opwijk | 1,392.75 mi (2,241.41 km) |
| Gebze to Ostend | 1,450.41 mi (2,334.21 km) |
| Gebze to Oud-Heverlee | 1,369.79 mi (2,204.46 km) |
| Gebze to Oud-Turnhout | 1,369.31 mi (2,203.70 km) |
| Gebze to Oudenaarde | 1,413.90 mi (2,275.45 km) |
| Gebze to Oudenburg | 1,446.14 mi (2,327.34 km) |
| Gebze to Oupeye | 1,326.90 mi (2,135.44 km) |
| Gebze to Overijse | 1,374.02 mi (2,211.28 km) |
| Gebze to Overpelt | 1,349.36 mi (2,171.59 km) |
| Gebze to Paal | 1,354.46 mi (2,179.79 km) |
| Gebze to Peer | 1,345.64 mi (2,165.61 km) |
| Gebze to Pepinster | 1,316.21 mi (2,118.23 km) |
| Gebze to Peruwelz | 1,407.13 mi (2,264.55 km) |
| Gebze to Perwez | 1,358.63 mi (2,186.51 km) |
| Gebze to Philippeville | 1,359.75 mi (2,188.30 km) |
