Yes, there are multiple flights from Thailand to Astana for under ฿ 41,853. The cheapest flight booked recently is on Turkish Airlines for just ฿ 40,657, but on average you can expect to pay ฿ 43,706.
There are no direct flights from Thailand to Astana, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
For as low as ฿ 40,747, Turkish Airlines can have you in Astana from Thailand in 18h 25m. Both multi-stop and direct flights can be found to your destination and back.
According to our current data, Turkish Airlines (฿ 40,658), and Aeroflot (฿ 45,650) offers the cheapest pricing from Thailand to Astana.