| Constanta to Ilawa | 769.51 mi (1,238.41 km) |
| Constanta to Imielin | 603.91 mi (971.90 km) |
| Constanta to Inowroclaw | 760.60 mi (1,224.07 km) |
| Constanta to Janow Lubelski | 537.35 mi (864.77 km) |
| Constanta to Jarocin | 743.17 mi (1,196.02 km) |
| Constanta to Jaroslaw | 491.50 mi (790.99 km) |
| Constanta to Jasien | 835.11 mi (1,343.97 km) |
| Constanta to Jaslo | 512.15 mi (824.22 km) |
| Constanta to Jastrzebie-Zdroj | 618.30 mi (995.06 km) |
| Constanta to Jawor | 747.70 mi (1,203.30 km) |
| Constanta to Jaworzno | 605.23 mi (974.03 km) |
| Constanta to Jedrzejow | 592.15 mi (952.97 km) |
| Constanta to Jelcz-Laskowice | 707.28 mi (1,138.25 km) |
| Constanta to Jelenia Gora | 758.91 mi (1,221.35 km) |
| Constanta to Jozefoslaw | 649.51 mi (1,045.29 km) |
