| Mountain Ash to Ilawa | 966.78 mi (1,555.88 km) |
| Mountain Ash to Imielin | 986.26 mi (1,587.23 km) |
| Mountain Ash to Inowroclaw | 915.38 mi (1,473.16 km) |
| Mountain Ash to Janow Lubelski | 1,112.99 mi (1,791.19 km) |
| Mountain Ash to Jarocin | 888.80 mi (1,430.39 km) |
| Mountain Ash to Jaroslaw | 1,136.42 mi (1,828.89 km) |
| Mountain Ash to Jasien | 926.35 mi (1,490.81 km) |
| Mountain Ash to Jaslo | 1,089.98 mi (1,754.16 km) |
| Mountain Ash to Jastrzebie-Zdroj | 962.48 mi (1,548.96 km) |
| Mountain Ash to Jawor | 843.20 mi (1,357.00 km) |
| Mountain Ash to Jaworzno | 987.29 mi (1,588.88 km) |
| Mountain Ash to Jedrzejow | 1,024.15 mi (1,648.21 km) |
| Mountain Ash to Jelcz-Laskowice | 891.78 mi (1,435.18 km) |
| Mountain Ash to Jelenia Gora | 825.22 mi (1,328.07 km) |
| Mountain Ash to Jozefoslaw | 1,037.02 mi (1,668.93 km) |
