| Alba Iulia to Octeville | 1,188.74 mi (1,913.10 km) |
| Alba Iulia to Oignies | 990.26 mi (1,593.67 km) |
| Alba Iulia to Oissel | 1,065.15 mi (1,714.19 km) |
| Alba Iulia to Olivet | 1,025.84 mi (1,650.93 km) |
| Alba Iulia to Ollioules | 892.98 mi (1,437.11 km) |
| Alba Iulia to Olonne-sur-Mer | 1,204.94 mi (1,939.16 km) |
| Alba Iulia to Oloron-Sainte-Marie | 1,200.42 mi (1,931.89 km) |
| Alba Iulia to Onet Village | 1,024.68 mi (1,649.06 km) |
| Alba Iulia to Onnaing | 963.08 mi (1,549.92 km) |
| Alba Iulia to Orange | 922.36 mi (1,484.39 km) |
| Alba Iulia to Orchies | 979.47 mi (1,576.31 km) |
| Alba Iulia to Orleans | 1,025.40 mi (1,650.22 km) |
| Alba Iulia to Orly | 1,004.01 mi (1,615.79 km) |
| Alba Iulia to Ormesson-sur-Marne | 997.53 mi (1,605.37 km) |
| Alba Iulia to Orsay | 1,013.22 mi (1,630.62 km) |
