| Portsmouth to Illzach | 433.36 mi (697.43 km) |
| Portsmouth to Ingre | 238.50 mi (383.83 km) |
| Portsmouth to Irigny | 446.60 mi (718.73 km) |
| Portsmouth to Isbergues | 155.54 mi (250.31 km) |
| Portsmouth to Issoire | 414.65 mi (667.31 km) |
| Portsmouth to Issoudun | 301.00 mi (484.41 km) |
| Portsmouth to Issy-les-Moulineaux | 202.83 mi (326.42 km) |
| Portsmouth to Istres | 578.55 mi (931.08 km) |
| Portsmouth to Ivry-sur-Seine | 207.05 mi (333.22 km) |
| Portsmouth to Jarville-la-Malgrange | 357.36 mi (575.12 km) |
| Portsmouth to Jeumont | 230.46 mi (370.90 km) |
| Portsmouth to Joigny | 280.49 mi (451.40 km) |
| Portsmouth to Joinville-le-Pont | 209.70 mi (337.48 km) |
| Portsmouth to Joue-les-Tours | 251.45 mi (404.67 km) |
| Portsmouth to Jouy-le-Moutier | 186.32 mi (299.86 km) |
