https://www.greattibettour.com/flights-to-tibet/bangkok.html
How to Take Flights to Tibet from Bangkok？
There are two convenient ways to take flights to Tibet from Bangkok.
1.Bangkok-Kathmandu-Lhasa
Since there is no direct flight from Thailand to Tibet, You can travel to Tibet via Kathmandu, the only country that operated direct flights to Tibet. Flights from Bangkok to Kathmandu run several times a day and cost for about $510 for a one-way ticket of the economy class cabin. And it will take about half-past 3 hours from Bangkok to Kathmandu. Meanwhile, there are two direct flights from Kathmandu to Tibet and several connecting flights to Tibet from Kathmandu. Taking a direct flight from Tribhuvan International Airport of Kathmandu to Lhasa Gonga International airport will take about 2 hours and cost $484 for a one-way ticket of the economy class cabin.
2.Bangkok-Chengdu-Lhasa
As the most popular gateway to Tibet, taking flights from Bangkok to Chengdu and transfer from Chengdu to Tibet is definitely a great idea. The journey from Bangkok to Chengdu will take about 3 hours and cost about $524 for a one-way ticket of the economy class cabin. In Chengdu, there are more than 10 flights to Lhasa and other cities of Tibet which makes it easy for you to arrive at your destinations.
