| Sidney to Oberkirch | 4,305.03 mi (6,928.27 km) |
| Sidney to Obernburg am Main | 4,300.19 mi (6,920.49 km) |
| Sidney to Obernkirchen | 4,215.36 mi (6,783.96 km) |
| Sidney to Oberschleissheim | 4,451.34 mi (7,163.73 km) |
| Sidney to Oberstdorf | 4,432.18 mi (7,132.91 km) |
| Sidney to Obertraubling | 4,447.65 mi (7,157.81 km) |
| Sidney to Obertshausen | 4,280.44 mi (6,888.71 km) |
| Sidney to Oberursel | 4,265.88 mi (6,865.27 km) |
| Sidney to Ochsenfurt | 4,342.38 mi (6,988.38 km) |
| Sidney to Ochsenhausen | 4,394.83 mi (7,072.80 km) |
| Sidney to Ochtrup | 4,145.97 mi (6,672.30 km) |
| Sidney to Odenthal | 4,181.94 mi (6,730.18 km) |
| Sidney to Oelde | 4,194.12 mi (6,749.78 km) |
| Sidney to Oelsnitz | 4,393.82 mi (7,071.18 km) |
| Sidney to Oer-Erkenschwick | 4,166.79 mi (6,705.80 km) |
