| Ann Arbor to Oberkirch | 4,197.65 mi (6,755.46 km) |
| Ann Arbor to Obernburg am Main | 4,190.27 mi (6,743.58 km) |
| Ann Arbor to Obernkirchen | 4,101.98 mi (6,601.51 km) |
| Ann Arbor to Oberschleissheim | 4,342.24 mi (6,988.16 km) |
| Ann Arbor to Oberstdorf | 4,325.10 mi (6,960.57 km) |
| Ann Arbor to Obertraubling | 4,337.20 mi (6,980.05 km) |
| Ann Arbor to Obertshausen | 4,170.36 mi (6,711.55 km) |
| Ann Arbor to Oberursel | 4,155.74 mi (6,688.02 km) |
| Ann Arbor to Ochsenfurt | 4,232.19 mi (6,811.06 km) |
| Ann Arbor to Ochsenhausen | 4,286.99 mi (6,899.25 km) |
| Ann Arbor to Ochtrup | 4,033.65 mi (6,491.53 km) |
| Ann Arbor to Odenthal | 4,071.37 mi (6,552.24 km) |
| Ann Arbor to Oelde | 4,081.85 mi (6,569.10 km) |
| Ann Arbor to Oelsnitz | 4,281.39 mi (6,890.23 km) |
| Ann Arbor to Oer-Erkenschwick | 4,055.26 mi (6,526.30 km) |
