| South Portland to Ilawa | 3,882.33 mi (6,248.00 km) |
| South Portland to Imielin | 3,990.17 mi (6,421.55 km) |
| South Portland to Inowroclaw | 3,862.33 mi (6,215.83 km) |
| South Portland to Janow Lubelski | 4,088.45 mi (6,579.73 km) |
| South Portland to Jarocin | 3,862.07 mi (6,215.40 km) |
| South Portland to Jaroslaw | 4,124.39 mi (6,637.56 km) |
| South Portland to Jasien | 3,821.73 mi (6,150.48 km) |
| South Portland to Jaslo | 4,089.37 mi (6,581.20 km) |
| South Portland to Jastrzebie-Zdroj | 3,972.61 mi (6,393.30 km) |
| South Portland to Jawor | 3,843.93 mi (6,186.20 km) |
| South Portland to Jaworzno | 3,989.65 mi (6,420.71 km) |
| South Portland to Jedrzejow | 4,012.98 mi (6,458.27 km) |
| South Portland to Jelcz-Laskowice | 3,887.44 mi (6,256.24 km) |
| South Portland to Jelenia Gora | 3,831.07 mi (6,165.52 km) |
| South Portland to Jozefoslaw | 3,987.79 mi (6,417.73 km) |
