| Effingham to Oberkirch | 4,531.03 mi (7,291.99 km) |
| Effingham to Obernburg am Main | 4,523.27 mi (7,279.50 km) |
| Effingham to Obernkirchen | 4,433.99 mi (7,135.82 km) |
| Effingham to Oberschleissheim | 4,675.39 mi (7,524.32 km) |
| Effingham to Oberstdorf | 4,658.50 mi (7,497.13 km) |
| Effingham to Obertraubling | 4,670.08 mi (7,515.76 km) |
| Effingham to Obertshausen | 4,503.34 mi (7,247.42 km) |
| Effingham to Oberursel | 4,488.71 mi (7,223.88 km) |
| Effingham to Ochsenfurt | 4,565.14 mi (7,346.88 km) |
| Effingham to Ochsenhausen | 4,620.32 mi (7,435.69 km) |
| Effingham to Ochtrup | 4,366.03 mi (7,026.45 km) |
| Effingham to Odenthal | 4,404.25 mi (7,087.95 km) |
| Effingham to Oelde | 4,414.25 mi (7,104.04 km) |
| Effingham to Oelsnitz | 4,613.71 mi (7,425.05 km) |
| Effingham to Oer-Erkenschwick | 4,387.88 mi (7,061.61 km) |
