| Grand Haven to Oberkirch | 4,257.74 mi (6,852.17 km) |
| Grand Haven to Obernburg am Main | 4,246.70 mi (6,834.41 km) |
| Grand Haven to Obernkirchen | 4,153.25 mi (6,684.01 km) |
| Grand Haven to Oberschleissheim | 4,399.73 mi (7,080.68 km) |
| Grand Haven to Oberstdorf | 4,385.46 mi (7,057.72 km) |
| Grand Haven to Obertraubling | 4,392.69 mi (7,069.36 km) |
| Grand Haven to Obertshausen | 4,226.59 mi (6,802.04 km) |
| Grand Haven to Oberursel | 4,211.91 mi (6,778.41 km) |
| Grand Haven to Ochsenfurt | 4,288.21 mi (6,901.20 km) |
| Grand Haven to Ochsenhausen | 4,346.34 mi (6,994.75 km) |
| Grand Haven to Ochtrup | 4,086.63 mi (6,576.79 km) |
| Grand Haven to Odenthal | 4,126.99 mi (6,641.76 km) |
| Grand Haven to Oelde | 4,134.86 mi (6,654.42 km) |
| Grand Haven to Oelsnitz | 4,333.93 mi (6,974.79 km) |
| Grand Haven to Oer-Erkenschwick | 4,109.43 mi (6,613.50 km) |
