The Mongolian Airlines operates basic flights to or from Mongolia. It's possible to fly by MIAT from Beijing, Moscow, Frankfurt, Berlin, Tokyo, Seoul and Huh hot to Ulaanbaatar.
You can also catch a train from Beijing, Moscow, and Irkutsk to Ulaanbaatar. This journey constitue a cheaper solution but also an exciting way of travelling in this train of legend

In Mongolia, the faithful mode of transportation will be vehicles. Especially the 4WD mini buses and jeeps are the most common and comfortable transports for your journey. The road condition in Mongolia is not so good. Travellers usually have to use natural ground roads in the countryside. However, you can fly by MIAT's domestic flights, or travel by train to some destinations. But we advice you to travel by vehicles, because you will be able to stop at some places, meet the locals, or enjoy the surrounding area. More information about MIAT is available at: http://www.miat.com and about Mongolian railway is available at: http://www.mtz.mn/