| Westlake to Oberkirch | 4,164.08 mi (6,701.44 km) |
| Westlake to Obernburg am Main | 4,159.77 mi (6,694.51 km) |
| Westlake to Obernkirchen | 4,075.91 mi (6,559.54 km) |
| Westlake to Oberschleissheim | 4,310.72 mi (6,937.43 km) |
| Westlake to Oberstdorf | 4,291.17 mi (6,905.98 km) |
| Westlake to Obertraubling | 4,307.35 mi (6,932.01 km) |
| Westlake to Obertshausen | 4,140.06 mi (6,662.79 km) |
| Westlake to Oberursel | 4,125.51 mi (6,639.37 km) |
| Westlake to Ochsenfurt | 4,202.01 mi (6,762.49 km) |
| Westlake to Ochsenhausen | 4,253.96 mi (6,846.09 km) |
| Westlake to Ochtrup | 4,006.21 mi (6,447.37 km) |
| Westlake to Odenthal | 4,041.68 mi (6,504.46 km) |
| Westlake to Oelde | 4,054.33 mi (6,524.81 km) |
| Westlake to Oelsnitz | 4,254.06 mi (6,846.25 km) |
| Westlake to Oer-Erkenschwick | 4,026.79 mi (6,480.50 km) |
