| Castlebar to Illzach | 836.30 mi (1,345.90 km) |
| Castlebar to Ingre | 633.92 mi (1,020.20 km) |
| Castlebar to Irigny | 844.10 mi (1,358.44 km) |
| Castlebar to Isbergues | 544.48 mi (876.25 km) |
| Castlebar to Issoire | 800.63 mi (1,288.48 km) |
| Castlebar to Issoudun | 687.98 mi (1,107.20 km) |
| Castlebar to Issy-les-Moulineaux | 607.45 mi (977.60 km) |
| Castlebar to Istres | 963.76 mi (1,551.02 km) |
| Castlebar to Ivry-sur-Seine | 611.84 mi (984.67 km) |
| Castlebar to Jarville-la-Malgrange | 758.01 mi (1,219.90 km) |
| Castlebar to Jeumont | 618.85 mi (995.94 km) |
| Castlebar to Joigny | 684.48 mi (1,101.57 km) |
| Castlebar to Joinville-le-Pont | 614.72 mi (989.29 km) |
| Castlebar to Joue-les-Tours | 625.84 mi (1,007.19 km) |
| Castlebar to Jouy-le-Moutier | 591.16 mi (951.37 km) |
