| Hafnarfjordhur to Oria | 2,266.99 mi (3,648.37 km) |
| Hafnarfjordhur to Oristano | 2,072.59 mi (3,335.51 km) |
| Hafnarfjordhur to Orta Nova | 2,166.11 mi (3,486.01 km) |
| Hafnarfjordhur to Orte | 2,011.56 mi (3,237.29 km) |
| Hafnarfjordhur to Ortona | 2,070.92 mi (3,332.83 km) |
| Hafnarfjordhur to Orvieto | 1,989.08 mi (3,201.11 km) |
| Hafnarfjordhur to Orzinuovi | 1,774.63 mi (2,855.99 km) |
| Hafnarfjordhur to Osimo | 1,979.93 mi (3,186.39 km) |
| Hafnarfjordhur to Ospitaletto | 1,769.21 mi (2,847.26 km) |
| Hafnarfjordhur to Ostuni | 2,251.84 mi (3,623.98 km) |
| Hafnarfjordhur to Ottaviano | 2,162.09 mi (3,479.55 km) |
| Hafnarfjordhur to Ovada | 1,786.58 mi (2,875.21 km) |
| Hafnarfjordhur to Ozieri | 2,040.52 mi (3,283.90 km) |
| Hafnarfjordhur to Paceco | 2,286.98 mi (3,680.53 km) |
| Hafnarfjordhur to Pachino | 2,428.79 mi (3,908.77 km) |
