Thai AirAsia X are starting to fly Brisbane - Bangkok direct from June 25 2019 onward prices from $239 ( add $50 for 20kg luggage).
To Bangkok:
Running from Brisbane four times per week and bound for Bangkok's Don Mueang International Airport (DMK), flight XJ311 will be wheels-up at 12:50pm on Tuesdays, Wednesdays, Saturdays and Sundays, reaching the Thailand national capital at 7:10pm local time.
To Brisbane:
XJ310 will fly to Brisbane at 11:40pm on Mondays, Tuesdays, Fridays and Saturdays, touching down at 11:35am the following calendar day.
Airbus 330 aircraft
Don Mueang … that's an experience and a half in itself.