| Box Elder to Oberkirch | 4,803.16 mi (7,729.94 km) |
| Box Elder to Obernburg am Main | 4,773.94 mi (7,682.92 km) |
| Box Elder to Obernkirchen | 4,656.13 mi (7,493.32 km) |
| Box Elder to Oberschleissheim | 4,929.27 mi (7,932.89 km) |
| Box Elder to Oberstdorf | 4,929.83 mi (7,933.79 km) |
| Box Elder to Obertraubling | 4,912.21 mi (7,905.44 km) |
| Box Elder to Obertshausen | 4,753.19 mi (7,649.53 km) |
| Box Elder to Oberursel | 4,738.47 mi (7,625.84 km) |
| Box Elder to Ochsenfurt | 4,812.46 mi (7,744.90 km) |
| Box Elder to Ochsenhausen | 4,886.31 mi (7,863.75 km) |
| Box Elder to Ochtrup | 4,599.71 mi (7,402.52 km) |
| Box Elder to Odenthal | 4,652.58 mi (7,487.60 km) |
| Box Elder to Oelde | 4,647.08 mi (7,478.75 km) |
| Box Elder to Oelsnitz | 4,839.51 mi (7,788.44 km) |
| Box Elder to Oer-Erkenschwick | 4,628.09 mi (7,448.19 km) |
