| Harwich to Ilawa | 771.42 mi (1,241.48 km) |
| Harwich to Imielin | 787.74 mi (1,267.74 km) |
| Harwich to Inowroclaw | 717.82 mi (1,155.22 km) |
| Harwich to Janow Lubelski | 913.81 mi (1,470.64 km) |
| Harwich to Jarocin | 689.90 mi (1,110.28 km) |
| Harwich to Jaroslaw | 937.44 mi (1,508.67 km) |
| Harwich to Jasien | 733.82 mi (1,180.97 km) |
| Harwich to Jaslo | 891.41 mi (1,434.59 km) |
| Harwich to Jastrzebie-Zdroj | 764.38 mi (1,230.14 km) |
| Harwich to Jawor | 644.20 mi (1,036.74 km) |
| Harwich to Jaworzno | 788.67 mi (1,269.24 km) |
| Harwich to Jedrzejow | 825.06 mi (1,327.81 km) |
| Harwich to Jelcz-Laskowice | 692.70 mi (1,114.79 km) |
| Harwich to Jelenia Gora | 626.42 mi (1,008.12 km) |
| Harwich to Jozefoslaw | 838.56 mi (1,349.54 km) |
