| Rancho Santa Margarita to Oerlinghausen | 5,691.13 mi (9,158.99 km) |
| Rancho Santa Margarita to Oestrich-Winkel | 5,771.15 mi (9,287.77 km) |
| Rancho Santa Margarita to Offenburg | 5,846.68 mi (9,409.33 km) |
| Rancho Santa Margarita to Oftersheim | 5,820.83 mi (9,367.72 km) |
| Rancho Santa Margarita to Ohrdruf | 5,809.14 mi (9,348.91 km) |
| Rancho Santa Margarita to Ohringen | 5,857.25 mi (9,426.34 km) |
| Rancho Santa Margarita to Olbernhau | 5,890.89 mi (9,480.47 km) |
| Rancho Santa Margarita to Olching | 5,963.79 mi (9,597.79 km) |
| Rancho Santa Margarita to Oldenburg | 5,618.57 mi (9,042.21 km) |
| Rancho Santa Margarita to Oldenburg in Holstein | 5,632.60 mi (9,064.79 km) |
| Rancho Santa Margarita to Olfen | 5,666.32 mi (9,119.06 km) |
| Rancho Santa Margarita to Olpe | 5,714.81 mi (9,197.11 km) |
| Rancho Santa Margarita to Olsberg | 5,717.13 mi (9,200.83 km) |
| Rancho Santa Margarita to Oranienburg | 5,776.55 mi (9,296.46 km) |
| Rancho Santa Margarita to Ortenberg | 5,784.65 mi (9,309.49 km) |
