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I thought about the AA program but it has a few set-backs for me. The biggest issue is I need an Asian airline which will give me 100% miles in discount classes (as I do a lot of SYD-Asia-SYD trips.
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I believe (with an Australian address) you get 100% AAdvantage miles for flights on BA in discount economy. They fly daily from SYD to SIN and BKK. Does that help you?