| Gary to Oberkirch | 4,368.18 mi (7,029.91 km) |
| Gary to Obernburg am Main | 4,358.17 mi (7,013.79 km) |
| Gary to Obernkirchen | 4,265.97 mi (6,865.41 km) |
| Gary to Oberschleissheim | 4,510.93 mi (7,259.64 km) |
| Gary to Oberstdorf | 4,495.84 mi (7,235.35 km) |
| Gary to Obertraubling | 4,504.42 mi (7,249.17 km) |
| Gary to Obertshausen | 4,338.11 mi (6,981.51 km) |
| Gary to Oberursel | 4,323.44 mi (6,957.90 km) |
| Gary to Ochsenfurt | 4,399.79 mi (7,080.77 km) |
| Gary to Ochsenhausen | 4,457.00 mi (7,172.86 km) |
| Gary to Ochtrup | 4,198.94 mi (6,757.54 km) |
| Gary to Odenthal | 4,238.66 mi (6,821.46 km) |
| Gary to Oelde | 4,247.18 mi (6,835.17 km) |
| Gary to Oelsnitz | 4,446.38 mi (7,155.76 km) |
| Gary to Oer-Erkenschwick | 4,221.46 mi (6,793.78 km) |
