| Grudziadz to Oerlinghausen | 434.60 mi (699.43 km) |
| Grudziadz to Oestrich-Winkel | 518.65 mi (834.69 km) |
| Grudziadz to Offenburg | 583.77 mi (939.49 km) |
| Grudziadz to Oftersheim | 521.61 mi (839.46 km) |
| Grudziadz to Ohrdruf | 386.20 mi (621.53 km) |
| Grudziadz to Ohringen | 496.66 mi (799.30 km) |
| Grudziadz to Olbernhau | 301.50 mi (485.22 km) |
| Grudziadz to Olching | 488.14 mi (785.58 km) |
| Grudziadz to Oldenburg | 435.35 mi (700.63 km) |
| Grudziadz to Oldenburg in Holstein | 325.20 mi (523.36 km) |
| Grudziadz to Olfen | 492.04 mi (791.86 km) |
| Grudziadz to Olpe | 491.89 mi (791.62 km) |
| Grudziadz to Olsberg | 456.85 mi (735.23 km) |
| Grudziadz to Oranienburg | 234.28 mi (377.04 km) |
| Grudziadz to Ortenberg | 466.00 mi (749.96 km) |
