| Portsmouth to Ilawa | 892.18 mi (1,435.82 km) |
| Portsmouth to Imielin | 891.30 mi (1,434.41 km) |
| Portsmouth to Inowroclaw | 835.41 mi (1,344.46 km) |
| Portsmouth to Janow Lubelski | 1,022.92 mi (1,646.22 km) |
| Portsmouth to Jarocin | 803.24 mi (1,292.69 km) |
| Portsmouth to Jaroslaw | 1,043.36 mi (1,679.12 km) |
| Portsmouth to Jasien | 857.17 mi (1,379.49 km) |
| Portsmouth to Jaslo | 994.89 mi (1,601.12 km) |
| Portsmouth to Jastrzebie-Zdroj | 866.17 mi (1,393.96 km) |
| Portsmouth to Jawor | 751.31 mi (1,209.11 km) |
| Portsmouth to Jaworzno | 892.71 mi (1,436.68 km) |
| Portsmouth to Jedrzejow | 932.37 mi (1,500.50 km) |
| Portsmouth to Jelcz-Laskowice | 800.41 mi (1,288.13 km) |
| Portsmouth to Jelenia Gora | 732.17 mi (1,178.31 km) |
| Portsmouth to Jozefoslaw | 953.42 mi (1,534.39 km) |
