| Niort to Obernburg am Main | 504.82 mi (812.43 km) |
| Niort to Obernkirchen | 594.69 mi (957.06 km) |
| Niort to Oberschleissheim | 578.49 mi (930.99 km) |
| Niort to Oberstdorf | 512.40 mi (824.63 km) |
| Niort to Obertraubling | 614.60 mi (989.10 km) |
| Niort to Obertshausen | 499.49 mi (803.86 km) |
| Niort to Oberursel | 494.01 mi (795.04 km) |
| Niort to Ochsenfurt | 537.65 mi (865.26 km) |
| Niort to Ochsenhausen | 502.89 mi (809.32 km) |
| Niort to Ochtrup | 532.36 mi (856.75 km) |
| Niort to Odenthal | 474.19 mi (763.14 km) |
| Niort to Oelde | 543.98 mi (875.45 km) |
| Niort to Oelsnitz | 643.71 mi (1,035.95 km) |
| Niort to Oer-Erkenschwick | 506.61 mi (815.31 km) |
| Niort to Oerlinghausen | 566.73 mi (912.06 km) |
