| Llantwit Major to Ilawa | 976.40 mi (1,571.36 km) |
| Llantwit Major to Imielin | 991.45 mi (1,595.59 km) |
| Llantwit Major to Inowroclaw | 923.94 mi (1,486.94 km) |
| Llantwit Major to Janow Lubelski | 1,119.48 mi (1,801.62 km) |
| Llantwit Major to Jarocin | 896.19 mi (1,442.27 km) |
| Llantwit Major to Jaroslaw | 1,142.17 mi (1,838.15 km) |
| Llantwit Major to Jasien | 936.89 mi (1,507.77 km) |
| Llantwit Major to Jaslo | 1,095.19 mi (1,762.53 km) |
| Llantwit Major to Jastrzebie-Zdroj | 967.29 mi (1,556.71 km) |
| Llantwit Major to Jawor | 849.09 mi (1,366.48 km) |
| Llantwit Major to Jaworzno | 992.58 mi (1,597.40 km) |
| Llantwit Major to Jedrzejow | 1,030.18 mi (1,657.91 km) |
| Llantwit Major to Jelcz-Laskowice | 897.83 mi (1,444.92 km) |
| Llantwit Major to Jelenia Gora | 830.81 mi (1,337.06 km) |
| Llantwit Major to Jozefoslaw | 1,044.93 mi (1,681.65 km) |
