| Leighton Buzzard to Illzach | 456.65 mi (734.90 km) |
| Leighton Buzzard to Ingre | 297.37 mi (478.57 km) |
| Leighton Buzzard to Irigny | 498.06 mi (801.55 km) |
| Leighton Buzzard to Isbergues | 161.71 mi (260.24 km) |
| Leighton Buzzard to Issoire | 474.81 mi (764.13 km) |
| Leighton Buzzard to Issoudun | 363.36 mi (584.77 km) |
| Leighton Buzzard to Issy-les-Moulineaux | 249.65 mi (401.78 km) |
| Leighton Buzzard to Istres | 636.69 mi (1,024.65 km) |
| Leighton Buzzard to Ivry-sur-Seine | 253.02 mi (407.20 km) |
| Leighton Buzzard to Jarville-la-Malgrange | 376.88 mi (606.53 km) |
| Leighton Buzzard to Jeumont | 235.01 mi (378.21 km) |
| Leighton Buzzard to Joigny | 326.16 mi (524.91 km) |
| Leighton Buzzard to Joinville-le-Pont | 254.53 mi (409.63 km) |
| Leighton Buzzard to Joue-les-Tours | 320.92 mi (516.47 km) |
| Leighton Buzzard to Jouy-le-Moutier | 233.22 mi (375.34 km) |
