| Highland Park to Oberkirch | 4,358.21 mi (7,013.86 km) |
| Highland Park to Obernburg am Main | 4,346.87 mi (6,995.60 km) |
| Highland Park to Obernkirchen | 4,252.85 mi (6,844.30 km) |
| Highland Park to Oberschleissheim | 4,499.98 mi (7,242.01 km) |
| Highland Park to Oberstdorf | 4,485.94 mi (7,219.42 km) |
| Highland Park to Obertraubling | 4,492.75 mi (7,230.39 km) |
| Highland Park to Obertshausen | 4,326.74 mi (6,963.21 km) |
| Highland Park to Oberursel | 4,312.05 mi (6,939.57 km) |
| Highland Park to Ochsenfurt | 4,388.33 mi (7,062.33 km) |
| Highland Park to Ochsenhausen | 4,446.74 mi (7,156.34 km) |
| Highland Park to Ochtrup | 4,186.44 mi (6,737.43 km) |
| Highland Park to Odenthal | 4,227.09 mi (6,802.84 km) |
| Highland Park to Oelde | 4,234.68 mi (6,815.06 km) |
| Highland Park to Oelsnitz | 4,433.68 mi (7,135.31 km) |
| Highland Park to Oer-Erkenschwick | 4,209.38 mi (6,774.34 km) |
