| Letterkenny to Illzach | 814.59 mi (1,310.95 km) |
| Letterkenny to Ingre | 635.50 mi (1,022.74 km) |
| Letterkenny to Irigny | 844.61 mi (1,359.26 km) |
| Letterkenny to Isbergues | 519.25 mi (835.66 km) |
| Letterkenny to Issoire | 809.04 mi (1,302.03 km) |
| Letterkenny to Issoudun | 695.02 mi (1,118.53 km) |
| Letterkenny to Issy-les-Moulineaux | 599.77 mi (965.24 km) |
| Letterkenny to Istres | 973.36 mi (1,566.47 km) |
| Letterkenny to Ivry-sur-Seine | 603.76 mi (971.65 km) |
| Letterkenny to Jarville-la-Malgrange | 734.46 mi (1,182.00 km) |
| Letterkenny to Jeumont | 590.10 mi (949.67 km) |
| Letterkenny to Joigny | 677.58 mi (1,090.46 km) |
| Letterkenny to Joinville-le-Pont | 606.02 mi (975.29 km) |
| Letterkenny to Joue-les-Tours | 637.86 mi (1,026.53 km) |
| Letterkenny to Jouy-le-Moutier | 583.14 mi (938.47 km) |
