| Walla Walla to Oberkirch | 5,148.95 mi (8,286.44 km) |
| Walla Walla to Obernburg am Main | 5,102.70 mi (8,212.00 km) |
| Walla Walla to Obernkirchen | 4,965.11 mi (7,990.57 km) |
| Walla Walla to Oberschleissheim | 5,255.24 mi (8,457.49 km) |
| Walla Walla to Oberstdorf | 5,270.57 mi (8,482.16 km) |
| Walla Walla to Obertraubling | 5,228.80 mi (8,414.95 km) |
| Walla Walla to Obertshausen | 5,082.01 mi (8,178.71 km) |
| Walla Walla to Oberursel | 5,067.75 mi (8,155.75 km) |
| Walla Walla to Ochsenfurt | 5,137.00 mi (8,267.20 km) |
| Walla Walla to Ochsenhausen | 5,224.03 mi (8,407.26 km) |
| Walla Walla to Ochtrup | 4,920.54 mi (7,918.85 km) |
| Walla Walla to Odenthal | 4,983.76 mi (8,020.59 km) |
| Walla Walla to Oelde | 4,965.43 mi (7,991.08 km) |
| Walla Walla to Oelsnitz | 5,144.81 mi (8,279.78 km) |
| Walla Walla to Oer-Erkenschwick | 4,953.36 mi (7,971.66 km) |
