| Ukiah to Oberkirch | 5,685.68 mi (9,150.22 km) |
| Ukiah to Obernburg am Main | 5,640.26 mi (9,077.12 km) |
| Ukiah to Obernkirchen | 5,503.22 mi (8,856.57 km) |
| Ukiah to Oberschleissheim | 5,793.00 mi (9,322.93 km) |
| Ukiah to Oberstdorf | 5,807.68 mi (9,346.56 km) |
| Ukiah to Obertraubling | 5,766.83 mi (9,280.82 km) |
| Ukiah to Obertshausen | 5,619.55 mi (9,043.80 km) |
| Ukiah to Oberursel | 5,605.26 mi (9,020.79 km) |
| Ukiah to Ochsenfurt | 5,674.74 mi (9,132.62 km) |
| Ukiah to Ochsenhausen | 5,761.26 mi (9,271.86 km) |
| Ukiah to Ochtrup | 5,458.29 mi (8,784.28 km) |
| Ukiah to Odenthal | 5,521.13 mi (8,885.40 km) |
| Ukiah to Oelde | 5,503.28 mi (8,856.68 km) |
| Ukiah to Oelsnitz | 5,683.04 mi (9,145.97 km) |
| Ukiah to Oer-Erkenschwick | 5,490.96 mi (8,836.84 km) |
