| Boulder to Ilawa | 5,184.80 mi (8,344.13 km) |
| Boulder to Imielin | 5,357.28 mi (8,621.71 km) |
| Boulder to Inowroclaw | 5,191.30 mi (8,354.59 km) |
| Boulder to Janow Lubelski | 5,415.21 mi (8,714.94 km) |
| Boulder to Jarocin | 5,212.76 mi (8,389.13 km) |
| Boulder to Jaroslaw | 5,460.32 mi (8,787.54 km) |
| Boulder to Jasien | 5,119.22 mi (8,238.58 km) |
| Boulder to Jaslo | 5,441.61 mi (8,757.43 km) |
| Boulder to Jastrzebie-Zdroj | 5,348.67 mi (8,607.85 km) |
| Boulder to Jawor | 5,222.33 mi (8,404.53 km) |
| Boulder to Jaworzno | 5,355.06 mi (8,618.13 km) |
| Boulder to Jedrzejow | 5,361.45 mi (8,628.43 km) |
| Boulder to Jelcz-Laskowice | 5,256.16 mi (8,458.97 km) |
| Boulder to Jelenia Gora | 5,216.10 mi (8,394.50 km) |
| Boulder to Jozefoslaw | 5,303.69 mi (8,535.47 km) |
