| Zachary to Oberkirch | 5,050.96 mi (8,128.74 km) |
| Zachary to Obernburg am Main | 5,051.41 mi (8,129.46 km) |
| Zachary to Obernkirchen | 4,973.16 mi (8,003.52 km) |
| Zachary to Oberschleissheim | 5,200.59 mi (8,369.54 km) |
| Zachary to Oberstdorf | 5,177.20 mi (8,331.91 km) |
| Zachary to Obertraubling | 5,199.67 mi (8,368.05 km) |
| Zachary to Obertshausen | 5,032.00 mi (8,098.23 km) |
| Zachary to Oberursel | 5,017.58 mi (8,075.01 km) |
| Zachary to Ochsenfurt | 5,094.03 mi (8,198.04 km) |
| Zachary to Ochsenhausen | 5,141.56 mi (8,274.54 km) |
| Zachary to Ochtrup | 4,902.01 mi (7,889.03 km) |
| Zachary to Odenthal | 4,934.62 mi (7,941.50 km) |
| Zachary to Oelde | 4,949.98 mi (7,966.23 km) |
| Zachary to Oelsnitz | 5,149.70 mi (8,287.64 km) |
| Zachary to Oer-Erkenschwick | 4,921.34 mi (7,920.13 km) |
