| Portchester to Ilawa | 892.65 mi (1,436.57 km) |
| Portchester to Imielin | 892.51 mi (1,436.36 km) |
| Portchester to Inowroclaw | 836.05 mi (1,345.49 km) |
| Portchester to Janow Lubelski | 1,023.95 mi (1,647.89 km) |
| Portchester to Jarocin | 804.08 mi (1,294.04 km) |
| Portchester to Jaroslaw | 1,044.51 mi (1,680.98 km) |
| Portchester to Jasien | 857.46 mi (1,379.95 km) |
| Portchester to Jaslo | 996.12 mi (1,603.10 km) |
| Portchester to Jastrzebie-Zdroj | 867.44 mi (1,396.01 km) |
| Portchester to Jawor | 752.38 mi (1,210.84 km) |
| Portchester to Jaworzno | 893.91 mi (1,438.61 km) |
| Portchester to Jedrzejow | 933.46 mi (1,502.26 km) |
| Portchester to Jelcz-Laskowice | 801.47 mi (1,289.84 km) |
| Portchester to Jelenia Gora | 733.28 mi (1,180.10 km) |
| Portchester to Jozefoslaw | 954.21 mi (1,535.65 km) |
