| Chelsea to Oberkirch | 3,682.88 mi (5,927.03 km) |
| Chelsea to Obernburg am Main | 3,687.86 mi (5,935.04 km) |
| Chelsea to Obernkirchen | 3,618.45 mi (5,823.33 km) |
| Chelsea to Oberschleissheim | 3,834.84 mi (6,171.59 km) |
| Chelsea to Oberstdorf | 3,808.29 mi (6,128.85 km) |
| Chelsea to Obertraubling | 3,836.58 mi (6,174.38 km) |
| Chelsea to Obertshausen | 3,668.86 mi (5,904.46 km) |
| Chelsea to Oberursel | 3,654.61 mi (5,881.53 km) |
| Chelsea to Ochsenfurt | 3,730.82 mi (6,004.18 km) |
| Chelsea to Ochsenhausen | 3,773.89 mi (6,073.50 km) |
| Chelsea to Ochtrup | 3,544.82 mi (5,704.84 km) |
| Chelsea to Odenthal | 3,572.96 mi (5,750.13 km) |
| Chelsea to Oelde | 3,592.38 mi (5,781.37 km) |
| Chelsea to Oelsnitz | 3,791.47 mi (6,101.78 km) |
| Chelsea to Oer-Erkenschwick | 3,562.02 mi (5,732.52 km) |
