My Tuesday flights already posted to my American AAdvantage account when I checked Tuesday evening. I didn’t wait until the morning to look because these flights would put me over 100,000 miles for the year.
I’ll hit $15,000 qualifying dollars soon as well (this includes qualifying dollars earned with a Barclays-issued AAdvantage card).
Other readers have confirmed that they’re also seeing miles posting right after flight. That’s new. It used to take until the next day for miles to post, and flights late in the day might take two days.
Delta and United already do this of course, but it’s notable that American has followed on this.