| Detroit to Oberkirch | 4,168.41 mi (6,708.41 km) |
| Detroit to Obernburg am Main | 4,161.49 mi (6,697.28 km) |
| Detroit to Obernkirchen | 4,073.91 mi (6,556.32 km) |
| Detroit to Oberschleissheim | 4,313.32 mi (6,941.62 km) |
| Detroit to Oberstdorf | 4,295.82 mi (6,913.45 km) |
| Detroit to Obertraubling | 4,308.53 mi (6,933.92 km) |
| Detroit to Obertshausen | 4,141.62 mi (6,665.29 km) |
| Detroit to Oberursel | 4,127.01 mi (6,641.78 km) |
| Detroit to Ochsenfurt | 4,203.47 mi (6,764.83 km) |
| Detroit to Ochsenhausen | 4,257.84 mi (6,852.33 km) |
| Detroit to Ochtrup | 4,005.34 mi (6,445.98 km) |
| Detroit to Odenthal | 4,042.72 mi (6,506.12 km) |
| Detroit to Oelde | 4,053.54 mi (6,523.54 km) |
| Detroit to Oelsnitz | 4,253.12 mi (6,844.74 km) |
| Detroit to Oer-Erkenschwick | 4,026.79 mi (6,480.50 km) |
