| Rancho Santa Margarita to Octeville | 5,478.18 mi (8,816.28 km) |
| Rancho Santa Margarita to Oignies | 5,592.41 mi (9,000.11 km) |
| Rancho Santa Margarita to Oissel | 5,583.36 mi (8,985.54 km) |
| Rancho Santa Margarita to Olivet | 5,679.73 mi (9,140.64 km) |
| Rancho Santa Margarita to Ollioules | 6,044.70 mi (9,728.01 km) |
| Rancho Santa Margarita to Olonne-sur-Mer | 5,612.41 mi (9,032.30 km) |
| Rancho Santa Margarita to Oloron-Sainte-Marie | 5,807.54 mi (9,346.34 km) |
| Rancho Santa Margarita to Onet Village | 5,869.86 mi (9,446.62 km) |
| Rancho Santa Margarita to Onnaing | 5,615.53 mi (9,037.32 km) |
| Rancho Santa Margarita to Orange | 5,959.11 mi (9,590.26 km) |
| Rancho Santa Margarita to Orchies | 5,600.13 mi (9,012.54 km) |
| Rancho Santa Margarita to Orleans | 5,678.19 mi (9,138.17 km) |
| Rancho Santa Margarita to Orly | 5,654.68 mi (9,100.33 km) |
| Rancho Santa Margarita to Ormesson-sur-Marne | 5,657.52 mi (9,104.90 km) |
| Rancho Santa Margarita to Orsay | 5,650.02 mi (9,092.83 km) |
