| Portici to Illzach | 591.91 mi (952.58 km) |
| Portici to Ingre | 787.57 mi (1,267.47 km) |
| Portici to Irigny | 584.12 mi (940.05 km) |
| Portici to Isbergues | 885.17 mi (1,424.54 km) |
| Portici to Issoire | 646.35 mi (1,040.19 km) |
| Portici to Issoudun | 745.21 mi (1,199.30 km) |
| Portici to Issy-les-Moulineaux | 808.03 mi (1,300.40 km) |
| Portici to Istres | 513.48 mi (826.36 km) |
| Portici to Ivry-sur-Seine | 803.62 mi (1,293.30 km) |
| Portici to Jarville-la-Malgrange | 672.61 mi (1,082.47 km) |
| Portici to Jeumont | 819.34 mi (1,318.60 km) |
| Portici to Joigny | 731.34 mi (1,176.98 km) |
| Portici to Joinville-le-Pont | 800.75 mi (1,288.68 km) |
| Portici to Joue-les-Tours | 813.36 mi (1,308.98 km) |
| Portici to Jouy-le-Moutier | 824.31 mi (1,326.59 km) |
