| Harlow to Ilawa | 821.05 mi (1,321.35 km) |
| Harlow to Imielin | 836.08 mi (1,345.54 km) |
| Harlow to Inowroclaw | 767.55 mi (1,235.25 km) |
| Harlow to Janow Lubelski | 962.98 mi (1,549.76 km) |
| Harlow to Jarocin | 739.42 mi (1,189.98 km) |
| Harlow to Jaroslaw | 986.20 mi (1,587.14 km) |
| Harlow to Jasien | 783.11 mi (1,260.29 km) |
| Harlow to Jaslo | 939.79 mi (1,512.45 km) |
| Harlow to Jastrzebie-Zdroj | 812.41 mi (1,307.45 km) |
| Harlow to Jawor | 692.99 mi (1,115.27 km) |
| Harlow to Jaworzno | 837.09 mi (1,347.16 km) |
| Harlow to Jedrzejow | 873.97 mi (1,406.52 km) |
| Harlow to Jelcz-Laskowice | 741.61 mi (1,193.50 km) |
| Harlow to Jelenia Gora | 675.00 mi (1,086.31 km) |
| Harlow to Jozefoslaw | 888.21 mi (1,429.44 km) |
