| Caerfyrddin to Illzach | 590.31 mi (950.01 km) |
| Caerfyrddin to Ingre | 385.29 mi (620.07 km) |
| Caerfyrddin to Irigny | 595.55 mi (958.45 km) |
| Caerfyrddin to Isbergues | 304.96 mi (490.79 km) |
| Caerfyrddin to Issoire | 555.43 mi (893.88 km) |
| Caerfyrddin to Issoudun | 441.78 mi (710.97 km) |
| Caerfyrddin to Issy-les-Moulineaux | 357.88 mi (575.95 km) |
| Caerfyrddin to Istres | 719.52 mi (1,157.96 km) |
| Caerfyrddin to Ivry-sur-Seine | 362.31 mi (583.08 km) |
| Caerfyrddin to Jarville-la-Malgrange | 513.63 mi (826.61 km) |
| Caerfyrddin to Jeumont | 380.76 mi (612.77 km) |
| Caerfyrddin to Joigny | 434.79 mi (699.73 km) |
| Caerfyrddin to Joinville-le-Pont | 365.26 mi (587.83 km) |
| Caerfyrddin to Joue-les-Tours | 382.64 mi (615.80 km) |
| Caerfyrddin to Jouy-le-Moutier | 341.65 mi (549.84 km) |
