| Smithville to Oberkirch | 4,746.05 mi (7,638.03 km) |
| Smithville to Obernburg am Main | 4,731.50 mi (7,614.62 km) |
| Smithville to Obernkirchen | 4,632.63 mi (7,455.50 km) |
| Smithville to Oberschleissheim | 4,885.38 mi (7,862.27 km) |
| Smithville to Oberstdorf | 4,873.88 mi (7,843.75 km) |
| Smithville to Obertraubling | 4,876.33 mi (7,847.69 km) |
| Smithville to Obertshausen | 4,711.21 mi (7,581.96 km) |
| Smithville to Oberursel | 4,696.48 mi (7,558.25 km) |
| Smithville to Ochsenfurt | 4,772.52 mi (7,680.62 km) |
| Smithville to Ochsenhausen | 4,833.85 mi (7,779.33 km) |
| Smithville to Ochtrup | 4,568.03 mi (7,351.53 km) |
| Smithville to Odenthal | 4,611.13 mi (7,420.89 km) |
| Smithville to Oelde | 4,616.23 mi (7,429.10 km) |
| Smithville to Oelsnitz | 4,814.47 mi (7,748.13 km) |
| Smithville to Oer-Erkenschwick | 4,592.09 mi (7,390.25 km) |
