| Harstad to Octeville | 1,459.31 mi (2,348.53 km) |
| Harstad to Oignies | 1,344.92 mi (2,164.44 km) |
| Harstad to Oissel | 1,442.30 mi (2,321.16 km) |
| Harstad to Olivet | 1,531.55 mi (2,464.78 km) |
| Harstad to Ollioules | 1,814.52 mi (2,920.18 km) |
| Harstad to Olonne-sur-Mer | 1,665.11 mi (2,679.74 km) |
| Harstad to Oloron-Sainte-Marie | 1,873.78 mi (3,015.55 km) |
| Harstad to Onet Village | 1,759.88 mi (2,832.25 km) |
| Harstad to Onnaing | 1,343.75 mi (2,162.55 km) |
| Harstad to Orange | 1,754.78 mi (2,824.05 km) |
| Harstad to Orchies | 1,341.77 mi (2,159.37 km) |
| Harstad to Orleans | 1,528.86 mi (2,460.47 km) |
| Harstad to Orly | 1,467.07 mi (2,361.02 km) |
| Harstad to Ormesson-sur-Marne | 1,462.65 mi (2,353.90 km) |
| Harstad to Orsay | 1,472.43 mi (2,369.65 km) |
