| Norwalk to Oberkirch | 5,846.94 mi (9,409.74 km) |
| Norwalk to Obernburg am Main | 5,811.76 mi (9,353.13 km) |
| Norwalk to Obernkirchen | 5,685.97 mi (9,150.69 km) |
| Norwalk to Oberschleissheim | 5,966.66 mi (9,602.42 km) |
| Norwalk to Oberstdorf | 5,972.38 mi (9,611.62 km) |
| Norwalk to Obertraubling | 5,946.05 mi (9,569.24 km) |
| Norwalk to Obertshausen | 5,790.96 mi (9,319.64 km) |
| Norwalk to Oberursel | 5,776.34 mi (9,296.13 km) |
| Norwalk to Ochsenfurt | 5,848.89 mi (9,412.88 km) |
| Norwalk to Ochsenhausen | 5,927.68 mi (9,539.69 km) |
| Norwalk to Ochtrup | 5,633.93 mi (9,066.93 km) |
| Norwalk to Odenthal | 5,690.80 mi (9,158.46 km) |
| Norwalk to Oelde | 5,680.54 mi (9,141.95 km) |
| Norwalk to Oelsnitz | 5,868.63 mi (9,444.65 km) |
| Norwalk to Oer-Erkenschwick | 5,664.07 mi (9,115.44 km) |
