| Adra to Oberkirch | 988.38 mi (1,590.64 km) |
| Adra to Obernburg am Main | 1,088.78 mi (1,752.22 km) |
| Adra to Obernkirchen | 1,223.91 mi (1,969.68 km) |
| Adra to Oberschleissheim | 1,084.23 mi (1,744.90 km) |
| Adra to Oberstdorf | 1,000.99 mi (1,610.94 km) |
| Adra to Obertraubling | 1,137.70 mi (1,830.95 km) |
| Adra to Obertshausen | 1,092.77 mi (1,758.64 km) |
| Adra to Oberursel | 1,093.56 mi (1,759.91 km) |
| Adra to Ochsenfurt | 1,105.13 mi (1,778.54 km) |
| Adra to Ochsenhausen | 1,021.64 mi (1,644.18 km) |
| Adra to Ochtrup | 1,177.94 mi (1,895.71 km) |
| Adra to Odenthal | 1,106.11 mi (1,780.11 km) |
| Adra to Oelde | 1,176.47 mi (1,893.35 km) |
| Adra to Oelsnitz | 1,207.30 mi (1,942.96 km) |
| Adra to Oer-Erkenschwick | 1,145.33 mi (1,843.23 km) |
