| Hafnarfjordhur to Opwijk | 1,307.94 mi (2,104.92 km) |
| Hafnarfjordhur to Ostend | 1,261.04 mi (2,029.45 km) |
| Hafnarfjordhur to Oud-Heverlee | 1,327.89 mi (2,137.03 km) |
| Hafnarfjordhur to Oud-Turnhout | 1,309.57 mi (2,107.55 km) |
| Hafnarfjordhur to Oudenaarde | 1,299.43 mi (2,091.22 km) |
| Hafnarfjordhur to Oudenburg | 1,265.47 mi (2,036.58 km) |
| Hafnarfjordhur to Oupeye | 1,360.39 mi (2,189.33 km) |
| Hafnarfjordhur to Overijse | 1,327.20 mi (2,135.92 km) |
| Hafnarfjordhur to Overpelt | 1,326.50 mi (2,134.80 km) |
| Hafnarfjordhur to Paal | 1,329.78 mi (2,140.07 km) |
| Hafnarfjordhur to Peer | 1,332.07 mi (2,143.75 km) |
| Hafnarfjordhur to Pepinster | 1,372.78 mi (2,209.27 km) |
| Hafnarfjordhur to Peruwelz | 1,317.72 mi (2,120.67 km) |
| Hafnarfjordhur to Perwez | 1,343.37 mi (2,161.94 km) |
| Hafnarfjordhur to Philippeville | 1,360.25 mi (2,189.11 km) |
