| Sioux City to Oberkirch | 4,657.38 mi (7,495.33 km) |
| Sioux City to Obernburg am Main | 4,636.92 mi (7,462.39 km) |
| Sioux City to Obernkirchen | 4,530.32 mi (7,290.84 km) |
| Sioux City to Oberschleissheim | 4,791.77 mi (7,711.61 km) |
| Sioux City to Oberstdorf | 4,785.07 mi (7,700.83 km) |
| Sioux City to Obertraubling | 4,779.51 mi (7,691.88 km) |
| Sioux City to Obertshausen | 4,616.39 mi (7,429.36 km) |
| Sioux City to Oberursel | 4,601.62 mi (7,405.60 km) |
| Sioux City to Ochsenfurt | 4,677.04 mi (7,526.98 km) |
| Sioux City to Ochsenhausen | 4,743.54 mi (7,633.98 km) |
| Sioux City to Ochtrup | 4,468.75 mi (7,191.76 km) |
| Sioux City to Odenthal | 4,515.83 mi (7,267.52 km) |
| Sioux City to Oelde | 4,516.75 mi (7,269.01 km) |
| Sioux City to Oelsnitz | 4,713.23 mi (7,585.21 km) |
| Sioux City to Oer-Erkenschwick | 4,494.58 mi (7,233.33 km) |
