How far is that train station from Xi'an international airport?

The train from Lhasa will arrive at the Main Railway Station. The distance between the airport and the railway station is around 22 miles (36 kilometers).
The transportation is convenient. You can take direct airport shuttle bus at Longhai Hotel (nearby the train station) and arrive at the terminal building. The operating hours are from 05:30 to 01:00 next day. The duration is around 70 mins. And it costs CNY 25 per person.
Notably, you need to arrive at the airport at least 2 hours in advance before the depature.
Hope helpful!