| Southend to Ilawa | 801.82 mi (1,290.40 km) |
| Southend to Imielin | 811.14 mi (1,305.41 km) |
| Southend to Inowroclaw | 746.78 mi (1,201.82 km) |
| Southend to Janow Lubelski | 939.42 mi (1,511.86 km) |
| Southend to Jarocin | 717.04 mi (1,153.97 km) |
| Southend to Jaroslaw | 961.85 mi (1,547.95 km) |
| Southend to Jasien | 765.46 mi (1,231.89 km) |
| Southend to Jaslo | 914.88 mi (1,472.35 km) |
| Southend to Jastrzebie-Zdroj | 787.10 mi (1,266.72 km) |
| Southend to Jawor | 668.81 mi (1,076.34 km) |
| Southend to Jaworzno | 812.26 mi (1,307.20 km) |
| Southend to Jedrzejow | 849.92 mi (1,367.82 km) |
| Southend to Jelcz-Laskowice | 717.60 mi (1,154.86 km) |
| Southend to Jelenia Gora | 650.47 mi (1,046.84 km) |
| Southend to Jozefoslaw | 866.43 mi (1,394.38 km) |
