| Rancho Santa Margarita to Oberkirch | 5,847.98 mi (9,411.41 km) |
| Rancho Santa Margarita to Obernburg am Main | 5,813.62 mi (9,356.12 km) |
| Rancho Santa Margarita to Obernkirchen | 5,688.78 mi (9,155.21 km) |
| Rancho Santa Margarita to Oberschleissheim | 5,968.62 mi (9,605.56 km) |
| Rancho Santa Margarita to Oberstdorf | 5,973.62 mi (9,613.62 km) |
| Rancho Santa Margarita to Obertraubling | 5,948.45 mi (9,573.10 km) |
| Rancho Santa Margarita to Obertshausen | 5,792.82 mi (9,322.64 km) |
| Rancho Santa Margarita to Oberursel | 5,778.19 mi (9,299.10 km) |
| Rancho Santa Margarita to Ochsenfurt | 5,850.94 mi (9,416.17 km) |
| Rancho Santa Margarita to Ochsenhausen | 5,929.09 mi (9,541.94 km) |
| Rancho Santa Margarita to Ochtrup | 5,636.20 mi (9,070.59 km) |
| Rancho Santa Margarita to Odenthal | 5,692.58 mi (9,161.32 km) |
| Rancho Santa Margarita to Oelde | 5,682.92 mi (9,145.77 km) |
| Rancho Santa Margarita to Oelsnitz | 5,871.58 mi (9,449.40 km) |
| Rancho Santa Margarita to Oer-Erkenschwick | 5,666.13 mi (9,118.76 km) |
