| Grudziadz to Oberkirch | 575.56 mi (926.27 km) |
| Grudziadz to Obernburg am Main | 482.38 mi (776.31 km) |
| Grudziadz to Obernkirchen | 410.29 mi (660.30 km) |
| Grudziadz to Oberschleissheim | 478.27 mi (769.71 km) |
| Grudziadz to Oberstdorf | 560.85 mi (902.60 km) |
| Grudziadz to Obertraubling | 422.58 mi (680.07 km) |
| Grudziadz to Obertshausen | 484.95 mi (780.45 km) |
| Grudziadz to Oberursel | 489.52 mi (787.80 km) |
| Grudziadz to Ochsenfurt | 457.24 mi (735.85 km) |
| Grudziadz to Ochsenhausen | 535.96 mi (862.54 km) |
| Grudziadz to Ochtrup | 490.07 mi (788.69 km) |
| Grudziadz to Odenthal | 519.86 mi (836.64 km) |
| Grudziadz to Oelde | 458.41 mi (737.74 km) |
| Grudziadz to Oelsnitz | 351.51 mi (565.71 km) |
| Grudziadz to Oer-Erkenschwick | 499.09 mi (803.20 km) |
