| Altadena to Oerlinghausen | 5,672.91 mi (9,129.67 km) |
| Altadena to Oestrich-Winkel | 5,754.26 mi (9,260.59 km) |
| Altadena to Offenburg | 5,830.67 mi (9,383.56 km) |
| Altadena to Oftersheim | 5,804.06 mi (9,340.73 km) |
| Altadena to Ohrdruf | 5,790.75 mi (9,319.31 km) |
| Altadena to Ohringen | 5,840.21 mi (9,398.91 km) |
| Altadena to Olbernhau | 5,871.56 mi (9,449.37 km) |
| Altadena to Olching | 5,946.54 mi (9,570.04 km) |
| Altadena to Oldenburg | 5,599.87 mi (9,012.12 km) |
| Altadena to Oldenburg in Holstein | 5,612.33 mi (9,032.18 km) |
| Altadena to Olfen | 5,648.71 mi (9,090.72 km) |
| Altadena to Olpe | 5,697.43 mi (9,169.12 km) |
| Altadena to Olsberg | 5,699.31 mi (9,172.16 km) |
| Altadena to Oranienburg | 5,756.22 mi (9,263.74 km) |
| Altadena to Ortenberg | 5,767.16 mi (9,281.34 km) |
