| Grojec to Oerlinghausen | 519.41 mi (835.91 km) |
| Grojec to Oestrich-Winkel | 574.12 mi (923.96 km) |
| Grojec to Offenburg | 617.67 mi (994.05 km) |
| Grojec to Oftersheim | 564.58 mi (908.60 km) |
| Grojec to Ohrdruf | 442.83 mi (712.67 km) |
| Grojec to Ohringen | 531.44 mi (855.27 km) |
| Grojec to Olbernhau | 335.92 mi (540.60 km) |
| Grojec to Olching | 493.21 mi (793.74 km) |
| Grojec to Oldenburg | 538.71 mi (866.97 km) |
| Grojec to Oldenburg in Holstein | 446.70 mi (718.90 km) |
| Grojec to Olfen | 575.53 mi (926.23 km) |
| Grojec to Olpe | 563.63 mi (907.08 km) |
| Grojec to Olsberg | 531.95 mi (856.09 km) |
| Grojec to Oranienburg | 327.97 mi (527.82 km) |
| Grojec to Ortenberg | 522.28 mi (840.53 km) |
