| Llantrisant to Illzach | 544.67 mi (876.56 km) |
| Llantrisant to Ingre | 341.19 mi (549.09 km) |
| Llantrisant to Irigny | 551.32 mi (887.27 km) |
| Llantrisant to Isbergues | 260.88 mi (419.85 km) |
| Llantrisant to Issoire | 512.91 mi (825.45 km) |
| Llantrisant to Issoudun | 399.00 mi (642.12 km) |
| Llantrisant to Issy-les-Moulineaux | 312.34 mi (502.66 km) |
| Llantrisant to Istres | 677.18 mi (1,089.82 km) |
| Llantrisant to Ivry-sur-Seine | 316.74 mi (509.75 km) |
| Llantrisant to Jarville-la-Malgrange | 468.21 mi (753.50 km) |
| Llantrisant to Jeumont | 336.71 mi (541.88 km) |
| Llantrisant to Joigny | 389.41 mi (626.69 km) |
| Llantrisant to Joinville-le-Pont | 319.65 mi (514.43 km) |
| Llantrisant to Joue-les-Tours | 341.54 mi (549.65 km) |
| Llantrisant to Jouy-le-Moutier | 296.06 mi (476.47 km) |
