| Quincy to Oberkirch | 3,688.19 mi (5,935.57 km) |
| Quincy to Obernburg am Main | 3,693.44 mi (5,944.02 km) |
| Quincy to Obernkirchen | 3,624.42 mi (5,832.95 km) |
| Quincy to Oberschleissheim | 3,840.29 mi (6,180.35 km) |
| Quincy to Oberstdorf | 3,813.53 mi (6,137.28 km) |
| Quincy to Obertraubling | 3,842.18 mi (6,183.38 km) |
| Quincy to Obertshausen | 3,674.46 mi (5,913.48 km) |
| Quincy to Oberursel | 3,660.23 mi (5,890.56 km) |
| Quincy to Ochsenfurt | 3,736.42 mi (6,013.18 km) |
| Quincy to Ochsenhausen | 3,779.23 mi (6,082.08 km) |
| Quincy to Ochtrup | 3,550.71 mi (5,714.32 km) |
| Quincy to Odenthal | 3,578.65 mi (5,759.28 km) |
| Quincy to Oelde | 3,598.24 mi (5,790.81 km) |
| Quincy to Oelsnitz | 3,797.29 mi (6,111.15 km) |
| Quincy to Oer-Erkenschwick | 3,567.81 mi (5,741.84 km) |
