| Great Cornard to Oberkirch | 403.46 mi (649.31 km) |
| Great Cornard to Obernburg am Main | 395.07 mi (635.80 km) |
| Great Cornard to Obernkirchen | 355.00 mi (571.32 km) |
| Great Cornard to Oberschleissheim | 544.65 mi (876.53 km) |
| Great Cornard to Oberstdorf | 531.18 mi (854.84 km) |
| Great Cornard to Obertraubling | 543.75 mi (875.09 km) |
| Great Cornard to Obertshausen | 376.04 mi (605.19 km) |
| Great Cornard to Oberursel | 361.85 mi (582.34 km) |
| Great Cornard to Ochsenfurt | 438.00 mi (704.89 km) |
| Great Cornard to Ochsenhausen | 490.48 mi (789.35 km) |
| Great Cornard to Ochtrup | 273.46 mi (440.09 km) |
| Great Cornard to Odenthal | 282.02 mi (453.86 km) |
| Great Cornard to Oelde | 315.43 mi (507.64 km) |
| Great Cornard to Oelsnitz | 505.83 mi (814.05 km) |
| Great Cornard to Oer-Erkenschwick | 278.73 mi (448.58 km) |
