| Poplar Bluff to Oberkirch | 4,717.54 mi (7,592.15 km) |
| Poplar Bluff to Obernburg am Main | 4,710.97 mi (7,581.58 km) |
| Poplar Bluff to Obernkirchen | 4,623.12 mi (7,440.19 km) |
| Poplar Bluff to Oberschleissheim | 4,862.74 mi (7,825.82 km) |
| Poplar Bluff to Oberstdorf | 4,844.88 mi (7,797.09 km) |
| Poplar Bluff to Obertraubling | 4,858.03 mi (7,818.25 km) |
| Poplar Bluff to Obertshausen | 4,691.11 mi (7,549.60 km) |
| Poplar Bluff to Oberursel | 4,676.50 mi (7,526.10 km) |
| Poplar Bluff to Ochsenfurt | 4,752.96 mi (7,649.15 km) |
| Poplar Bluff to Ochsenhausen | 4,807.07 mi (7,736.23 km) |
| Poplar Bluff to Ochtrup | 4,554.74 mi (7,330.14 km) |
| Poplar Bluff to Odenthal | 4,592.21 mi (7,390.45 km) |
| Poplar Bluff to Oelde | 4,602.93 mi (7,407.71 km) |
| Poplar Bluff to Oelsnitz | 4,802.49 mi (7,728.87 km) |
| Poplar Bluff to Oer-Erkenschwick | 4,576.26 mi (7,364.78 km) |
