| Caerphilly to Illzach | 539.57 mi (868.35 km) |
| Caerphilly to Ingre | 338.26 mi (544.38 km) |
| Caerphilly to Irigny | 548.26 mi (882.34 km) |
| Caerphilly to Isbergues | 254.82 mi (410.09 km) |
| Caerphilly to Issoire | 510.69 mi (821.88 km) |
| Caerphilly to Issoudun | 396.70 mi (638.43 km) |
| Caerphilly to Issy-les-Moulineaux | 308.28 mi (496.12 km) |
| Caerphilly to Istres | 675.00 mi (1,086.31 km) |
| Caerphilly to Ivry-sur-Seine | 312.64 mi (503.14 km) |
| Caerphilly to Jarville-la-Malgrange | 462.86 mi (744.90 km) |
| Caerphilly to Jeumont | 330.65 mi (532.12 km) |
| Caerphilly to Joigny | 385.52 mi (620.44 km) |
| Caerphilly to Joinville-le-Pont | 315.48 mi (507.72 km) |
| Caerphilly to Joue-les-Tours | 339.95 mi (547.10 km) |
| Caerphilly to Jouy-le-Moutier | 291.94 mi (469.83 km) |
