| Euclid to Oberkirch | 4,141.71 mi (6,665.43 km) |
| Euclid to Obernburg am Main | 4,137.60 mi (6,658.82 km) |
| Euclid to Obernkirchen | 4,054.06 mi (6,524.37 km) |
| Euclid to Oberschleissheim | 4,288.47 mi (6,901.63 km) |
| Euclid to Oberstdorf | 4,268.77 mi (6,869.93 km) |
| Euclid to Obertraubling | 4,285.22 mi (6,896.39 km) |
| Euclid to Obertshausen | 4,117.90 mi (6,627.13 km) |
| Euclid to Oberursel | 4,103.36 mi (6,603.72 km) |
| Euclid to Ochsenfurt | 4,179.86 mi (6,726.84 km) |
| Euclid to Ochsenhausen | 4,231.62 mi (6,810.13 km) |
| Euclid to Ochtrup | 3,984.26 mi (6,412.04 km) |
| Euclid to Odenthal | 4,019.57 mi (6,468.87 km) |
| Euclid to Oelde | 4,032.37 mi (6,489.48 km) |
| Euclid to Oelsnitz | 4,232.11 mi (6,810.93 km) |
| Euclid to Oer-Erkenschwick | 4,004.77 mi (6,445.05 km) |
