| South Bend to Oberkirch | 4,322.93 mi (6,957.09 km) |
| South Bend to Obernburg am Main | 4,313.89 mi (6,942.53 km) |
| South Bend to Obernkirchen | 4,223.10 mi (6,796.43 km) |
| South Bend to Oberschleissheim | 4,466.37 mi (7,187.93 km) |
| South Bend to Oberstdorf | 4,450.52 mi (7,162.42 km) |
| South Bend to Obertraubling | 4,460.40 mi (7,178.33 km) |
| South Bend to Obertshausen | 4,293.89 mi (6,910.34 km) |
| South Bend to Oberursel | 4,279.23 mi (6,886.76 km) |
| South Bend to Ochsenfurt | 4,355.63 mi (7,009.70 km) |
| South Bend to Ochsenhausen | 4,411.96 mi (7,100.36 km) |
| South Bend to Ochtrup | 4,155.60 mi (6,687.79 km) |
| South Bend to Odenthal | 4,194.59 mi (6,750.55 km) |
| South Bend to Oelde | 4,203.82 mi (6,765.40 km) |
| South Bend to Oelsnitz | 4,403.17 mi (7,086.22 km) |
| South Bend to Oer-Erkenschwick | 4,177.79 mi (6,723.50 km) |
