| Castaic to Illzach | 5,846.23 mi (9,408.60 km) |
| Castaic to Ingre | 5,661.56 mi (9,111.40 km) |
| Castaic to Irigny | 5,871.65 mi (9,449.51 km) |
| Castaic to Isbergues | 5,551.79 mi (8,934.74 km) |
| Castaic to Issoire | 5,825.03 mi (9,374.48 km) |
| Castaic to Issoudun | 5,714.10 mi (9,195.96 km) |
| Castaic to Issy-les-Moulineaux | 5,632.67 mi (9,064.91 km) |
| Castaic to Istres | 5,985.38 mi (9,632.55 km) |
| Castaic to Ivry-sur-Seine | 5,636.85 mi (9,071.64 km) |
| Castaic to Jarville-la-Malgrange | 5,765.52 mi (9,278.71 km) |
| Castaic to Jeumont | 5,619.09 mi (9,043.06 km) |
| Castaic to Joigny | 5,710.34 mi (9,189.90 km) |
| Castaic to Joinville-le-Pont | 5,639.38 mi (9,075.71 km) |
| Castaic to Joue-les-Tours | 5,649.72 mi (9,092.34 km) |
| Castaic to Jouy-le-Moutier | 5,616.14 mi (9,038.30 km) |
