| Westmont to Oberkirch | 5,851.64 mi (9,417.30 km) |
| Westmont to Obernburg am Main | 5,816.17 mi (9,360.22 km) |
| Westmont to Obernkirchen | 5,690.04 mi (9,157.24 km) |
| Westmont to Oberschleissheim | 5,971.04 mi (9,609.45 km) |
| Westmont to Oberstdorf | 5,977.00 mi (9,619.06 km) |
| Westmont to Obertraubling | 5,950.26 mi (9,576.02 km) |
| Westmont to Obertshausen | 5,795.36 mi (9,326.74 km) |
| Westmont to Oberursel | 5,780.76 mi (9,303.23 km) |
| Westmont to Ochsenfurt | 5,853.23 mi (9,419.86 km) |
| Westmont to Ochsenhausen | 5,932.25 mi (9,547.04 km) |
| Westmont to Ochtrup | 5,638.19 mi (9,073.79 km) |
| Westmont to Odenthal | 5,695.24 mi (9,165.61 km) |
| Westmont to Oelde | 5,684.77 mi (9,148.75 km) |
| Westmont to Oelsnitz | 5,872.65 mi (9,451.12 km) |
| Westmont to Oer-Erkenschwick | 5,668.41 mi (9,122.43 km) |
