| Red Oak to Oberkirch | 5,178.93 mi (8,334.68 km) |
| Red Oak to Obernburg am Main | 5,170.45 mi (8,321.04 km) |
| Red Oak to Obernkirchen | 5,079.37 mi (8,174.46 km) |
| Red Oak to Oberschleissheim | 5,322.84 mi (8,566.29 km) |
| Red Oak to Oberstdorf | 5,306.44 mi (8,539.89 km) |
| Red Oak to Obertraubling | 5,317.01 mi (8,556.90 km) |
| Red Oak to Obertshausen | 5,150.46 mi (8,288.87 km) |
| Red Oak to Oberursel | 5,135.82 mi (8,265.30 km) |
| Red Oak to Ochsenfurt | 5,212.21 mi (8,388.25 km) |
| Red Oak to Ochsenhausen | 5,268.12 mi (8,478.22 km) |
| Red Oak to Ochtrup | 5,012.10 mi (8,066.20 km) |
| Red Oak to Odenthal | 5,051.20 mi (8,129.12 km) |
| Red Oak to Oelde | 5,060.33 mi (8,143.82 km) |
| Red Oak to Oelsnitz | 5,259.63 mi (8,464.55 km) |
| Red Oak to Oer-Erkenschwick | 5,034.38 mi (8,102.05 km) |
