Credit card benefits on codeshare flights purchased on AA.com
 

I am a current holder of the US Airway Barclaycard. I am looking into booking an Alaska Airlines operated flight, is there any advantage to booking the flight through American's website over Alaska's website?

And if I use my US Airway Barclaycard to purchase the ticket through American's website, will I get any of the credit card benefits?

Will I get double miles per $ when paying with the US Airway Barclaycard?
Will I get my first checked bag free?

I'm guessing the answer to these questions are no since the flight is operated by Alaska Airlines.

You would probably get double miles, because the charge will (I think) come from AA.

Definitely no baggage benefits.

The reason to consider booking through Alaska is lower change fees.

Oh wow, didn't know that there are no cancellation fees for 60+ day cancellations on Alaska Airlines! So if I do make a cancellation with Alaska Airlines, I'm assuming the funds go back as Alaska Airline credit that expire within a year of original ticket purchase?