Thai rules have changed. They make rules not AA.
Screenshot your 2nd covid vaccine. No covid test required.
I answered your question several times. Flew local and international.
The rules have changed. 1 month ago is different to now. No issues in Isaan, CM or Singapore.
What more do you want? Its pretty easy to take a screenshot of papers anyway.
Thats not true. They would lose money. AA is never cheaper with 3rd parties.
You must be talking about full service airlines which have bigger margins and mark ups.
Checking in for boarding pass is 50 years old. Online check in is maybe 15 years old. Done within 24 hours.
Simply go to airline counter 2.5 hrs before flight and check in if you cannot do it online.
The email booking should tell you this if you read it.
Those sites (not sights) are worse. Higher fees for changing flights. AA website is good.
Always deal direct. AA has people in airports to solve issues.