| West Covina to Oerlinghausen | 5,674.76 mi (9,132.64 km) |
| West Covina to Oestrich-Winkel | 5,755.65 mi (9,262.83 km) |
| West Covina to Offenburg | 5,831.77 mi (9,385.32 km) |
| West Covina to Oftersheim | 5,805.41 mi (9,342.91 km) |
| West Covina to Ohrdruf | 5,792.66 mi (9,322.38 km) |
| West Covina to Ohringen | 5,841.66 mi (9,401.24 km) |
| West Covina to Olbernhau | 5,873.79 mi (9,452.96 km) |
| West Covina to Olching | 5,948.06 mi (9,572.48 km) |
| West Covina to Oldenburg | 5,601.88 mi (9,015.35 km) |
| West Covina to Oldenburg in Holstein | 5,614.89 mi (9,036.28 km) |
| West Covina to Olfen | 5,650.34 mi (9,093.35 km) |
| West Covina to Olpe | 5,698.99 mi (9,171.63 km) |
| West Covina to Olsberg | 5,701.02 mi (9,174.91 km) |
| West Covina to Oranienburg | 5,758.80 mi (9,267.89 km) |
| West Covina to Ortenberg | 5,768.75 mi (9,283.91 km) |
