| Welwyn Garden City to Illzach | 436.01 mi (701.68 km) |
| Welwyn Garden City to Ingre | 283.08 mi (455.57 km) |
| Welwyn Garden City to Irigny | 481.18 mi (774.39 km) |
| Welwyn Garden City to Isbergues | 140.82 mi (226.62 km) |
| Welwyn Garden City to Issoire | 460.15 mi (740.53 km) |
| Welwyn Garden City to Issoudun | 349.73 mi (562.84 km) |
| Welwyn Garden City to Issy-les-Moulineaux | 232.93 mi (374.86 km) |
| Welwyn Garden City to Istres | 621.16 mi (999.67 km) |
| Welwyn Garden City to Ivry-sur-Seine | 236.10 mi (379.96 km) |
| Welwyn Garden City to Jarville-la-Malgrange | 356.08 mi (573.05 km) |
| Welwyn Garden City to Jeumont | 213.74 mi (343.98 km) |
| Welwyn Garden City to Joigny | 308.70 mi (496.80 km) |
| Welwyn Garden City to Joinville-le-Pont | 237.38 mi (382.03 km) |
| Welwyn Garden City to Joue-les-Tours | 310.17 mi (499.17 km) |
| Welwyn Garden City to Jouy-le-Moutier | 216.68 mi (348.72 km) |
