Yes, there are multiple flights from Bangkok to Klagenfurt for under ฿ 42,027. The cheapest flight booked recently is on Austrian Airlines for just ฿ 39,145, but on average you can expect to pay ฿ 41,786.
There are no direct flights from Bangkok to Klagenfurt, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
We forecast the temperature to be around the 36 °Cs in April, on average. The temperature in Klagenfurt is generally colder than in Bangkok. Book flights in a timely manner in correlation to your departure date.
For as low as ฿ 39,145, Austrian Airlines can have you in Klagenfurt from Bangkok in 15h 55m. This flight may include one or multiple stops.
Cheapflights users have booked flights from Bangkok to Klagenfurt from ฿ 39,145 return. Another airline that can offer you cheap pricing is Lufthansa.