| Ponca City to Oberkirch | 4,973.33 mi (8,003.81 km) |
| Ponca City to Obernburg am Main | 4,959.43 mi (7,981.43 km) |
| Ponca City to Obernkirchen | 4,861.16 mi (7,823.29 km) |
| Ponca City to Oberschleissheim | 5,113.19 mi (8,228.88 km) |
| Ponca City to Oberstdorf | 5,101.15 mi (8,209.51 km) |
| Ponca City to Obertraubling | 5,104.43 mi (8,214.79 km) |
| Ponca City to Obertshausen | 4,939.16 mi (7,948.81 km) |
| Ponca City to Oberursel | 4,924.44 mi (7,925.12 km) |
| Ponca City to Ochsenfurt | 5,000.52 mi (8,047.56 km) |
| Ponca City to Ochsenhausen | 5,061.31 mi (8,145.39 km) |
| Ponca City to Ochtrup | 4,796.37 mi (7,719.02 km) |
| Ponca City to Odenthal | 4,839.14 mi (7,787.85 km) |
| Ponca City to Oelde | 4,844.58 mi (7,796.60 km) |
| Ponca City to Oelsnitz | 5,042.91 mi (8,115.78 km) |
| Ponca City to Oer-Erkenschwick | 4,820.29 mi (7,757.51 km) |
