| Cluj-Napoca to Octeville | 1,172.77 mi (1,887.38 km) |
| Cluj-Napoca to Oignies | 971.10 mi (1,562.83 km) |
| Cluj-Napoca to Oissel | 1,049.82 mi (1,689.53 km) |
| Cluj-Napoca to Olivet | 1,015.15 mi (1,633.72 km) |
| Cluj-Napoca to Ollioules | 900.51 mi (1,449.23 km) |
| Cluj-Napoca to Olonne-sur-Mer | 1,197.46 mi (1,927.13 km) |
| Cluj-Napoca to Oloron-Sainte-Marie | 1,202.65 mi (1,935.48 km) |
| Cluj-Napoca to Onet Village | 1,025.59 mi (1,650.52 km) |
| Cluj-Napoca to Onnaing | 943.98 mi (1,519.20 km) |
| Cluj-Napoca to Orange | 925.52 mi (1,489.49 km) |
| Cluj-Napoca to Orchies | 960.22 mi (1,545.32 km) |
| Cluj-Napoca to Orleans | 1,014.59 mi (1,632.82 km) |
| Cluj-Napoca to Orly | 990.48 mi (1,594.02 km) |
| Cluj-Napoca to Ormesson-sur-Marne | 983.85 mi (1,583.36 km) |
| Cluj-Napoca to Orsay | 999.85 mi (1,609.10 km) |
