Quote Originally Posted by mrs767er View Post
You get to move up next day if you list for a flight the day before? Wow--DL is strictly seniority/priority. Thru is only if same flight number--not that frequent these days.

AA boarding priority is based on a combination of boarding priority and the time you check-in for your flight.
Thru pax go before “local”(originating pax) in the same pass category.
And yup, you’re rolled over one day to the next.