| North Liberty to Oberkirch | 4,521.18 mi (7,276.13 km) |
| North Liberty to Obernburg am Main | 4,506.59 mi (7,252.66 km) |
| North Liberty to Obernkirchen | 4,407.95 mi (7,093.91 km) |
| North Liberty to Oberschleissheim | 4,660.47 mi (7,500.30 km) |
| North Liberty to Oberstdorf | 4,649.01 mi (7,481.86 km) |
| North Liberty to Obertraubling | 4,651.45 mi (7,485.78 km) |
| North Liberty to Obertshausen | 4,486.30 mi (7,220.01 km) |
| North Liberty to Oberursel | 4,471.57 mi (7,196.30 km) |
| North Liberty to Ochsenfurt | 4,547.62 mi (7,318.69 km) |
| North Liberty to Ochsenhausen | 4,608.96 mi (7,417.40 km) |
| North Liberty to Ochtrup | 4,343.23 mi (6,989.75 km) |
| North Liberty to Odenthal | 4,386.23 mi (7,058.96 km) |
| North Liberty to Oelde | 4,391.43 mi (7,067.32 km) |
| North Liberty to Oelsnitz | 4,589.72 mi (7,386.44 km) |
| North Liberty to Oer-Erkenschwick | 4,367.23 mi (7,028.38 km) |
