| Richardson to Oberkirch | 5,152.66 mi (8,292.41 km) |
| Richardson to Obernburg am Main | 5,143.74 mi (8,278.05 km) |
| Richardson to Obernkirchen | 5,052.06 mi (8,130.51 km) |
| Richardson to Oberschleissheim | 5,296.25 mi (8,523.50 km) |
| Richardson to Oberstdorf | 5,280.21 mi (8,497.68 km) |
| Richardson to Obertraubling | 5,290.18 mi (8,513.73 km) |
| Richardson to Obertshausen | 5,123.72 mi (8,245.84 km) |
| Richardson to Oberursel | 5,109.07 mi (8,222.25 km) |
| Richardson to Ochsenfurt | 5,185.45 mi (8,345.17 km) |
| Richardson to Ochsenhausen | 5,241.76 mi (8,435.80 km) |
| Richardson to Ochtrup | 4,984.99 mi (8,022.56 km) |
| Richardson to Odenthal | 5,024.38 mi (8,085.96 km) |
| Richardson to Oelde | 5,033.22 mi (8,100.19 km) |
| Richardson to Oelsnitz | 5,232.46 mi (8,420.82 km) |
| Richardson to Oer-Erkenschwick | 5,007.40 mi (8,058.63 km) |
