| Duzce to Opwijk | 1,461.83 mi (2,352.59 km) |
| Duzce to Ostend | 1,519.52 mi (2,445.43 km) |
| Duzce to Oud-Heverlee | 1,438.94 mi (2,315.75 km) |
| Duzce to Oud-Turnhout | 1,436.92 mi (2,312.50 km) |
| Duzce to Oudenaarde | 1,483.63 mi (2,387.68 km) |
| Duzce to Oudenburg | 1,515.32 mi (2,438.67 km) |
| Duzce to Oupeye | 1,395.77 mi (2,246.28 km) |
| Duzce to Overijse | 1,443.40 mi (2,322.92 km) |
| Duzce to Overpelt | 1,416.95 mi (2,280.36 km) |
| Duzce to Paal | 1,422.72 mi (2,289.64 km) |
| Duzce to Peer | 1,413.45 mi (2,274.72 km) |
| Duzce to Pepinster | 1,385.37 mi (2,229.53 km) |
| Duzce to Peruwelz | 1,477.75 mi (2,378.21 km) |
| Duzce to Perwez | 1,428.27 mi (2,298.58 km) |
| Duzce to Philippeville | 1,430.69 mi (2,302.47 km) |
