| Troutdale to Oberkirch | 5,284.56 mi (8,504.68 km) |
| Troutdale to Obernburg am Main | 5,234.85 mi (8,424.68 km) |
| Troutdale to Obernkirchen | 5,093.58 mi (8,197.32 km) |
| Troutdale to Oberschleissheim | 5,386.14 mi (8,668.15 km) |
| Troutdale to Oberstdorf | 5,404.59 mi (8,697.85 km) |
| Troutdale to Obertraubling | 5,357.77 mi (8,622.49 km) |
| Troutdale to Obertshausen | 5,214.26 mi (8,391.54 km) |
| Troutdale to Oberursel | 5,200.16 mi (8,368.84 km) |
| Troutdale to Ochsenfurt | 5,268.09 mi (8,478.17 km) |
| Troutdale to Ochsenhausen | 5,357.60 mi (8,622.22 km) |
| Troutdale to Ochtrup | 5,051.78 mi (8,130.06 km) |
| Troutdale to Odenthal | 5,116.94 mi (8,234.92 km) |
| Troutdale to Oelde | 5,095.93 mi (8,201.10 km) |
| Troutdale to Oelsnitz | 5,271.67 mi (8,483.94 km) |
| Troutdale to Oer-Erkenschwick | 5,085.40 mi (8,184.16 km) |
