Originally Posted by
MSPeconomist
AmEx PTS/CTS in the USA is usually able to sell tickets on foreign carriers, although there is a ticketing service charge. Try calling them. If you don't have a regular platinum/Centurion card, you could try an AmEx travel service office.
I’m not sure AirAsia is a normal enough carrier.
I do see them listed on some countries Expedia, like Indonesia. You can try skyscanner.com, or it’s Asia web sites too for Asian LCC’s.