| California to Octeville | 3,646.20 mi (5,867.99 km) |
| California to Oignies | 3,821.62 mi (6,150.30 km) |
| California to Oissel | 3,768.71 mi (6,065.15 km) |
| California to Olivet | 3,839.12 mi (6,178.47 km) |
| California to Ollioules | 4,145.25 mi (6,671.13 km) |
| California to Olonne-sur-Mer | 3,710.05 mi (5,970.75 km) |
| California to Oloron-Sainte-Marie | 3,847.70 mi (6,192.27 km) |
| California to Onet Village | 3,962.32 mi (6,376.74 km) |
| California to Onnaing | 3,848.52 mi (6,193.59 km) |
| California to Orange | 4,068.69 mi (6,547.92 km) |
| California to Orchies | 3,831.82 mi (6,166.72 km) |
| California to Orleans | 3,838.52 mi (6,177.50 km) |
| California to Orly | 3,838.34 mi (6,177.22 km) |
| California to Ormesson-sur-Marne | 3,843.49 mi (6,185.51 km) |
| California to Orsay | 3,830.73 mi (6,164.97 km) |
