| Encinitas to Octeville | 5,499.01 mi (8,849.81 km) |
| Encinitas to Oignies | 5,615.04 mi (9,036.54 km) |
| Encinitas to Oissel | 5,604.86 mi (9,020.14 km) |
| Encinitas to Olivet | 5,700.72 mi (9,174.42 km) |
| Encinitas to Ollioules | 6,064.68 mi (9,760.16 km) |
| Encinitas to Olonne-sur-Mer | 5,631.54 mi (9,063.08 km) |
| Encinitas to Oloron-Sainte-Marie | 5,825.25 mi (9,374.83 km) |
| Encinitas to Onet Village | 5,889.29 mi (9,477.89 km) |
| Encinitas to Onnaing | 5,638.31 mi (9,073.98 km) |
| Encinitas to Orange | 5,979.20 mi (9,622.60 km) |
| Encinitas to Orchies | 5,622.85 mi (9,049.10 km) |
| Encinitas to Orleans | 5,699.20 mi (9,171.98 km) |
| Encinitas to Orly | 5,676.27 mi (9,135.08 km) |
| Encinitas to Ormesson-sur-Marne | 5,679.18 mi (9,139.75 km) |
| Encinitas to Orsay | 5,671.53 mi (9,127.44 km) |
