| Opoczno to Isny im Allgau | 524.67 mi (844.38 km) |
| Opoczno to Isselburg | 593.00 mi (954.34 km) |
| Opoczno to Issum | 596.04 mi (959.24 km) |
| Opoczno to Itzehoe | 483.96 mi (778.87 km) |
| Opoczno to Jena | 378.14 mi (608.56 km) |
| Opoczno to Jever | 542.12 mi (872.46 km) |
| Opoczno to Jork | 470.20 mi (756.72 km) |
| Opoczno to Juchen | 595.74 mi (958.75 km) |
| Opoczno to Julich | 603.59 mi (971.39 km) |
| Opoczno to Juterbog | 311.81 mi (501.81 km) |
| Opoczno to Kaarst | 589.84 mi (949.26 km) |
| Opoczno to Kaiserslautern | 566.36 mi (911.47 km) |
| Opoczno to Kalkar | 600.75 mi (966.81 km) |
| Opoczno to Kall | 599.63 mi (965.01 km) |
| Opoczno to Kaltenkirchen | 464.95 mi (748.27 km) |
