Hi,

I am just curious why do you want to switch to AA just because of this promo? From your description, it seems that if SE Asia is your main destination, I think it will be wiser to use the money spend on AA to move from Silver to Gld with Skymiles.

Since DL has taken over NW, your chances of any FF benefits are higher by flying DL/NW metal to SE Asia rather than to codeshare AA flights on CX metals. Futhermore, if you do make it to Plat with DL, you will even get the systemwide upgrade coupons for use with certain fare classes for your trips down to SE Asia.

Sorry, but i just don't see the logic here switching to AA if you don't fly frequently with AA/OW and your main destinations are in SE Asia where DL/NW has a better coverage with their own metal.

If I were you, I will stick with DL, unless you see in the long-term your flying pattern will change and you move towards AA destinations.

Just my 2cents..