| Indianapolis to Oberkirch | 4,406.41 mi (7,091.44 km) |
| Indianapolis to Obernburg am Main | 4,400.26 mi (7,081.54 km) |
| Indianapolis to Obernkirchen | 4,313.42 mi (6,941.77 km) |
| Indianapolis to Oberschleissheim | 4,551.86 mi (7,325.51 km) |
| Indianapolis to Oberstdorf | 4,533.72 mi (7,296.32 km) |
| Indianapolis to Obertraubling | 4,547.44 mi (7,318.40 km) |
| Indianapolis to Obertshausen | 4,380.43 mi (7,049.62 km) |
| Indianapolis to Oberursel | 4,365.83 mi (7,026.13 km) |
| Indianapolis to Ochsenfurt | 4,442.31 mi (7,149.20 km) |
| Indianapolis to Ochsenhausen | 4,495.99 mi (7,235.60 km) |
| Indianapolis to Ochtrup | 4,244.67 mi (6,831.13 km) |
| Indianapolis to Odenthal | 4,281.65 mi (6,890.64 km) |
| Indianapolis to Oelde | 4,292.85 mi (6,908.67 km) |
| Indianapolis to Oelsnitz | 4,492.47 mi (7,229.93 km) |
| Indianapolis to Oer-Erkenschwick | 4,265.95 mi (6,865.38 km) |
