| Oregon to Oberkirch | 4,214.13 mi (6,781.98 km) |
| Oregon to Obernburg am Main | 4,207.99 mi (6,772.11 km) |
| Oregon to Obernkirchen | 4,121.45 mi (6,632.84 km) |
| Oregon to Oberschleissheim | 4,359.57 mi (7,016.05 km) |
| Oregon to Oberstdorf | 4,341.44 mi (6,986.88 km) |
| Oregon to Obertraubling | 4,355.20 mi (7,009.02 km) |
| Oregon to Obertshausen | 4,188.17 mi (6,740.20 km) |
| Oregon to Oberursel | 4,173.57 mi (6,716.72 km) |
| Oregon to Ochsenfurt | 4,250.05 mi (6,839.80 km) |
| Oregon to Ochsenhausen | 4,303.70 mi (6,926.14 km) |
| Oregon to Ochtrup | 4,052.57 mi (6,521.99 km) |
| Oregon to Odenthal | 4,089.41 mi (6,581.27 km) |
| Oregon to Oelde | 4,100.75 mi (6,599.52 km) |
| Oregon to Oelsnitz | 4,300.39 mi (6,920.81 km) |
| Oregon to Oer-Erkenschwick | 4,073.78 mi (6,556.12 km) |
