| Opoczno to Glyka Nera | 940.96 mi (1,514.32 km) |
| Opoczno to Grevena | 782.13 mi (1,258.71 km) |
| Opoczno to Ialysos | 1,103.77 mi (1,776.35 km) |
| Opoczno to Ilion | 936.82 mi (1,507.66 km) |
| Opoczno to Ilioupoli | 944.07 mi (1,519.33 km) |
| Opoczno to Ioannina | 809.79 mi (1,303.23 km) |
| Opoczno to Irakleio | 1,133.85 mi (1,824.75 km) |
| Opoczno to Irakleio | 936.26 mi (1,506.76 km) |
| Opoczno to Kaisariani | 941.75 mi (1,515.61 km) |
| Opoczno to Kalamaria | 756.53 mi (1,217.52 km) |
| Opoczno to Kalamata | 994.78 mi (1,600.95 km) |
| Opoczno to Kallithea | 942.50 mi (1,516.80 km) |
| Opoczno to Kalymnos | 1,046.90 mi (1,684.83 km) |
| Opoczno to Kalyvia Thorikou | 952.37 mi (1,532.69 km) |
| Opoczno to Kamatero | 935.12 mi (1,504.93 km) |
