| Round Rock to Ilawa | 5,522.38 mi (8,887.41 km) |
| Round Rock to Imielin | 5,661.48 mi (9,111.27 km) |
| Round Rock to Inowroclaw | 5,514.68 mi (8,875.01 km) |
| Round Rock to Janow Lubelski | 5,743.00 mi (9,242.47 km) |
| Round Rock to Jarocin | 5,524.38 mi (8,890.63 km) |
| Round Rock to Jaroslaw | 5,783.63 mi (9,307.85 km) |
| Round Rock to Jasien | 5,458.41 mi (8,784.47 km) |
| Round Rock to Jaslo | 5,755.45 mi (9,262.51 km) |
| Round Rock to Jastrzebie-Zdroj | 5,647.55 mi (9,088.86 km) |
| Round Rock to Jawor | 5,518.22 mi (8,880.71 km) |
| Round Rock to Jaworzno | 5,660.21 mi (9,109.22 km) |
| Round Rock to Jedrzejow | 5,676.37 mi (9,135.23 km) |
| Round Rock to Jelcz-Laskowice | 5,558.10 mi (8,944.90 km) |
| Round Rock to Jelenia Gora | 5,508.03 mi (8,864.32 km) |
| Round Rock to Jozefoslaw | 5,635.84 mi (9,070.01 km) |
