| Klamath Falls to Oberkirch | 5,464.69 mi (8,794.57 km) |
| Klamath Falls to Obernburg am Main | 5,418.31 mi (8,719.93 km) |
| Klamath Falls to Obernkirchen | 5,280.39 mi (8,497.96 km) |
| Klamath Falls to Oberschleissheim | 5,570.77 mi (8,965.29 km) |
| Klamath Falls to Oberstdorf | 5,586.27 mi (8,990.23 km) |
| Klamath Falls to Obertraubling | 5,544.16 mi (8,922.46 km) |
| Klamath Falls to Obertshausen | 5,397.63 mi (8,686.64 km) |
| Klamath Falls to Oberursel | 5,383.37 mi (8,663.70 km) |
| Klamath Falls to Ochsenfurt | 5,452.54 mi (8,775.01 km) |
| Klamath Falls to Ochsenhausen | 5,539.72 mi (8,915.31 km) |
| Klamath Falls to Ochtrup | 5,236.08 mi (8,426.66 km) |
| Klamath Falls to Odenthal | 5,299.42 mi (8,528.59 km) |
| Klamath Falls to Oelde | 5,280.91 mi (8,498.80 km) |
| Klamath Falls to Oelsnitz | 5,459.91 mi (8,786.88 km) |
| Klamath Falls to Oer-Erkenschwick | 5,268.95 mi (8,479.56 km) |
