| Douai to Obernburg am Main | 271.03 mi (436.18 km) |
| Douai to Obernkirchen | 291.63 mi (469.33 km) |
| Douai to Oberschleissheim | 409.14 mi (658.44 km) |
| Douai to Oberstdorf | 385.54 mi (620.46 km) |
| Douai to Obertraubling | 417.50 mi (671.90 km) |
| Douai to Obertshausen | 255.16 mi (410.63 km) |
| Douai to Oberursel | 242.89 mi (390.89 km) |
| Douai to Ochsenfurt | 314.08 mi (505.47 km) |
| Douai to Ochsenhausen | 348.09 mi (560.20 km) |
| Douai to Ochtrup | 218.13 mi (351.05 km) |
| Douai to Odenthal | 182.44 mi (293.62 km) |
| Douai to Oelde | 241.98 mi (389.43 km) |
| Douai to Oelsnitz | 400.01 mi (643.75 km) |
| Douai to Oer-Erkenschwick | 201.43 mi (324.17 km) |
| Douai to Oerlinghausen | 265.86 mi (427.86 km) |
