| Hafnarfjordhur to Octeville | 1,245.14 mi (2,003.86 km) |
| Hafnarfjordhur to Oignies | 1,305.51 mi (2,101.02 km) |
| Hafnarfjordhur to Oissel | 1,324.43 mi (2,131.46 km) |
| Hafnarfjordhur to Olivet | 1,431.08 mi (2,303.10 km) |
| Hafnarfjordhur to Ollioules | 1,809.08 mi (2,911.44 km) |
| Hafnarfjordhur to Olonne-sur-Mer | 1,432.16 mi (2,304.83 km) |
| Hafnarfjordhur to Oloron-Sainte-Marie | 1,666.23 mi (2,681.54 km) |
| Hafnarfjordhur to Onet Village | 1,659.68 mi (2,671.00 km) |
| Hafnarfjordhur to Onnaing | 1,325.37 mi (2,132.98 km) |
| Hafnarfjordhur to Orange | 1,723.86 mi (2,774.28 km) |
| Hafnarfjordhur to Orchies | 1,311.51 mi (2,110.67 km) |
| Hafnarfjordhur to Orleans | 1,428.97 mi (2,299.70 km) |
| Hafnarfjordhur to Orly | 1,390.50 mi (2,237.80 km) |
| Hafnarfjordhur to Ormesson-sur-Marne | 1,391.53 mi (2,239.45 km) |
| Hafnarfjordhur to Orsay | 1,388.30 mi (2,234.25 km) |
