Currently, there is a Business Class Deal from Oslo where you can fly with Austrian Airlines to Bangkok for only 1550€ Return in Business Class. The first segment is with Austrian via Vienna, and the second segment is with Swiss and Helvetic via Zurich.
Unfortunately, this price is only available on the set dates. All other dates have different and higher prices. The dates we have found are the following: 07.05.2025 for the departure flight and 21.05.2025 for the return flight
The fare is Business Basic (Booking class P), and it is possible to change the ticket for a fee. The Business Basic fare will include a complimentary seat reservation, 2x32kg luggage and lounge access. You can book directly with Austrian Airlines on their website. However, the price will be in NOK (Norwegian Krone). The final price might vary, as there is only limited availability. When we checked the dates, the total cost was 17,692 NOK (1542€ with the current conversation rate of 23.03.2025).
Below, we included a summary from Wheretocredit, including how many miles you could earn with this booking. This trip would also be ideal for someone collecting the miles for the Star Alliance Gold Status (particularly with Aegean Airlines or Turkish Airlines).