| Westbrook to Oberkirch | 3,603.05 mi (5,798.55 km) |
| Westbrook to Obernburg am Main | 3,606.34 mi (5,803.84 km) |
| Westbrook to Obernkirchen | 3,534.55 mi (5,688.31 km) |
| Westbrook to Oberschleissheim | 3,754.11 mi (6,041.66 km) |
| Westbrook to Oberstdorf | 3,728.86 mi (6,001.02 km) |
| Westbrook to Obertraubling | 3,754.95 mi (6,043.01 km) |
| Westbrook to Obertshausen | 3,587.20 mi (5,773.05 km) |
| Westbrook to Oberursel | 3,572.90 mi (5,750.02 km) |
| Westbrook to Ochsenfurt | 3,649.20 mi (5,872.83 km) |
| Westbrook to Ochsenhausen | 3,693.90 mi (5,944.76 km) |
| Westbrook to Ochtrup | 3,461.48 mi (5,570.71 km) |
| Westbrook to Odenthal | 3,490.82 mi (5,617.94 km) |
| Westbrook to Oelde | 3,509.15 mi (5,647.43 km) |
| Westbrook to Oelsnitz | 3,708.47 mi (5,968.20 km) |
| Westbrook to Oer-Erkenschwick | 3,479.22 mi (5,599.27 km) |
