Originally Posted by
guv1976
This is not new. From the AAdvantage award page:
"AAnytime award levels vary by date and region. There are select dates that require a higher number of miles (in addition to Level 1 and 2 awards). When you search for awards while booking, you’ll see the applicable award level."
I've seen it vary by day before.
I have not seen it vary by flight on same route on same day before.