| Castelldefels to Illzach | 521.07 mi (838.57 km) |
| Castelldefels to Ingre | 458.88 mi (738.50 km) |
| Castelldefels to Irigny | 335.34 mi (539.68 km) |
| Castelldefels to Isbergues | 645.97 mi (1,039.58 km) |
| Castelldefels to Issoire | 301.46 mi (485.15 km) |
| Castelldefels to Issoudun | 391.63 mi (630.27 km) |
| Castelldefels to Issy-les-Moulineaux | 521.43 mi (839.16 km) |
| Castelldefels to Istres | 217.87 mi (350.63 km) |
| Castelldefels to Ivry-sur-Seine | 520.48 mi (837.63 km) |
| Castelldefels to Jarville-la-Malgrange | 550.60 mi (886.10 km) |
| Castelldefels to Jeumont | 631.12 mi (1,015.69 km) |
| Castelldefels to Joigny | 468.29 mi (753.64 km) |
| Castelldefels to Joinville-le-Pont | 521.62 mi (839.47 km) |
| Castelldefels to Joue-les-Tours | 424.48 mi (683.13 km) |
| Castelldefels to Jouy-le-Moutier | 534.15 mi (859.64 km) |
