| Harrow on the Hill to Illzach | 431.22 mi (693.98 km) |
| Harrow on the Hill to Ingre | 269.59 mi (433.87 km) |
| Harrow on the Hill to Irigny | 470.04 mi (756.45 km) |
| Harrow on the Hill to Isbergues | 137.42 mi (221.16 km) |
| Harrow on the Hill to Issoire | 446.98 mi (719.34 km) |
| Harrow on the Hill to Issoudun | 335.79 mi (540.40 km) |
| Harrow on the Hill to Issy-les-Moulineaux | 221.63 mi (356.68 km) |
| Harrow on the Hill to Istres | 608.71 mi (979.62 km) |
| Harrow on the Hill to Ivry-sur-Seine | 225.02 mi (362.14 km) |
| Harrow on the Hill to Jarville-la-Malgrange | 351.87 mi (566.28 km) |
| Harrow on the Hill to Jeumont | 212.08 mi (341.31 km) |
| Harrow on the Hill to Joigny | 298.23 mi (479.96 km) |
| Harrow on the Hill to Joinville-le-Pont | 226.56 mi (364.62 km) |
| Harrow on the Hill to Joue-les-Tours | 294.57 mi (474.06 km) |
| Harrow on the Hill to Jouy-le-Moutier | 205.19 mi (330.23 km) |
