| Leighton Buzzard to Ilawa | 850.79 mi (1,369.21 km) |
| Leighton Buzzard to Imielin | 869.83 mi (1,399.86 km) |
| Leighton Buzzard to Inowroclaw | 798.51 mi (1,285.09 km) |
| Leighton Buzzard to Janow Lubelski | 995.85 mi (1,602.67 km) |
| Leighton Buzzard to Jarocin | 771.57 mi (1,241.71 km) |
| Leighton Buzzard to Jaroslaw | 1,019.59 mi (1,640.86 km) |
| Leighton Buzzard to Jasien | 811.58 mi (1,306.10 km) |
| Leighton Buzzard to Jaslo | 973.52 mi (1,566.73 km) |
| Leighton Buzzard to Jastrzebie-Zdroj | 846.38 mi (1,362.11 km) |
| Leighton Buzzard to Jawor | 726.34 mi (1,168.93 km) |
| Leighton Buzzard to Jaworzno | 870.78 mi (1,401.38 km) |
| Leighton Buzzard to Jedrzejow | 907.19 mi (1,459.98 km) |
| Leighton Buzzard to Jelcz-Laskowice | 774.83 mi (1,246.97 km) |
| Leighton Buzzard to Jelenia Gora | 708.55 mi (1,140.31 km) |
| Leighton Buzzard to Jozefoslaw | 919.88 mi (1,480.41 km) |
